Important Update News

The RRUFF Project has been migrated to RRUFF.net. Please update your bookmarks immediately, if you have not done so.

The data on this website is already three years out of date, and the entire website will be taken offline before the end of the year.

We are grateful to NASA for the funding of this effort.

Welcome to the RRUFF Project website containing an integrated database of Raman spectra, X-ray diffraction and chemistry data for minerals.

Search RRUFF Sample Data

Search Results

Sort By:
Displaying: 2301 - 2400 ‹‹ Prev   1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 ‹24› 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43   Next ››
4216 Records Found

Liebigite
RRUFF ID: R050662
Ideal Chemistry: Ca2(U6+O2)(CO3)3·11H2O
Locality: Schwartzwaelder mine, Jefferson County, Colorado, USA
Source: University of Arizona Mineral Museum 9102
Owner: RRUFF
Description: Yellowish-green flaky aggregate
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis

Likasite
RRUFF ID: R060327
Ideal Chemistry: Cu2+3N5+O3(OH)5·2H2O
Locality: Dzhezkazgan, Kazakhstan
Source: Michael Scott S100260
Owner: RRUFF
Description: Blue granular
Status: The identification of this mineral is not yet confirmed.
Quick search: [ All Likasite samples (2) ]

Likasite
RRUFF ID: R090009
Ideal Chemistry: Cu2+3N5+O3(OH)5·2H2O
Locality: Likasi Mine, Jadotville, Katanga, Zaire
Source: William W. Pinch
Owner: RRUFF
Description: Electric blue acicular crystals in a vug on cuprite matrix.
Status: The identification of this mineral has been confirmed by single-crystal X-ray diffraction.
Quick search: [ All Likasite samples (2) ]

Lileyite
RRUFF ID: R140773
Ideal Chemistry: Ba2Ti4+2Na2Fe2+Mg(Si2O7)2O2F2
Locality: Graulay, Hillesheim, Eifel, Rhineland-Palatinate, Germany
Source: Ch. and H. Schäfer
Owner: RRUFF
Description: Reddish brown prismatic crystals with fine striations, associated with pyroxene, schorlomite and leucite.
Status: The identification of this mineral has been confirmed by single-crystal X-ray diffraction.
Mineral Group: [ Lamprophyllite (9) ]

Lillianite
RRUFF ID: R110141
Ideal Chemistry: Pb2+3-2xAg1+xBi3+2+xS2-6
Locality: Pedro claim, King County, Washington, USA
Source: Rob Lavinsky
Owner: RRUFF
Description: Elongated prismatic silver gray metallic crystal, with severe exterior corrosion associated with aikinite, galena, neyite, and gustavite
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ Lillianite (17) ]

Linarite
RRUFF ID: R060130
Ideal Chemistry: Pb2+Cu2+S6+O4(OH)2
Locality: Graham County, Arizona, USA
Source: University of Arizona Mineral Museum 9890
Owner: RRUFF
Description: Azure-blue fragments in quartz
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Mineral Group: [ Linarite (8) ]
Quick search: [ All Linarite samples (3) ]

Linarite
RRUFF ID: R060472
Ideal Chemistry: Pb2+Cu2+S6+O4(OH)2
Locality: Tiger, Arizona, USA
Source: Michael Scott S100365
Owner: RRUFF
Description: Blue tabular crystals
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ Linarite (8) ]
Quick search: [ All Linarite samples (3) ]

Linarite
RRUFF ID: R120094
Ideal Chemistry: Pb2+Cu2+S6+O4(OH)2
Locality: Daoping mine, Guangxi, China
Source: Michael Scott S101361
Owner: RRUFF
Description: Massive crystalline blebs associated with cerussite, dundasite R060760, and anglesite
Status: The identification of this mineral has been confirmed by single-crystal X-ray diffraction.
Mineral Group: [ Linarite (8) ]
Quick search: [ All Linarite samples (3) ]

Lindgrenite
RRUFF ID: R050213
Ideal Chemistry: Cu2+3(Mo6+O4)2(OH)2
Locality: Chuquicamata mine, Calama, Antofagasta Province, Chile
Source: John Dagenais
Owner: RRUFF
Description: Green tabular single crystals
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Quick search: [ All Lindgrenite samples (3) ]

Lindgrenite
RRUFF ID: R060241
Ideal Chemistry: Cu2+3(Mo6+O4)2(OH)2
Locality: San Samuel mine, Carrera Pinto, Chile
Source: Rock Currier
Owner: RRUFF
Description: Dark green tabular crystals associated with antlerite, pseudomalachite, albite, dravite and monazite
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Quick search: [ All Lindgrenite samples (3) ]

Lindgrenite
RRUFF ID: R110061
Ideal Chemistry: Cu2+3(Mo6+O4)2(OH)2
Locality: Childs Aldwinkle mine, Copper Creek, Pinal County, Arizona, USA
Source: Ron Gibbs
Owner: RRUFF
Description: Pale green needles
Status: The identification of this mineral has been confirmed only by single crystal X-ray diffraction.
Quick search: [ All Lindgrenite samples (3) ]

Línekite
RRUFF ID: R141026
Ideal Chemistry: K2Ca3[(U6+O2)(CO3)3]2·8H2O
Locality: Svornost Mine, Jáchymov, Krušné Hory Mts, Karlovy Vary, Bohemia, Czech Republic
Source: William W. Pinch
Owner: RRUFF
Description: Light green tabular crystals
Status: The identification of this mineral has been confirmed only by single crystal X-ray diffraction.

Liottite
RRUFF ID: R120045
Ideal Chemistry: Na16Ca8Si18Al18O72(S6+O4)5Cl4
Locality: Case Collina (Toscopomici quarry), Pitigliano, Grosseto Province, Tuscany, Italy
Source: R. Van Dommelen
Owner: RRUFF
Description: Pseudhexagonal colorless crystals, associated with grossular
Status: The identification of this mineral has been confirmed only by single crystal X-ray diffraction.
Mineral Group: [ cancrinite-sodalite (37) ]

Lipscombite
RRUFF ID: R220008
Ideal Chemistry: Fe2+Fe3+2(PO4)2(OH)2
Locality: Silver Coin Mine, Valmy, Iron Point Mining District, Humboldt County, Nevada, USA
Source: Ron Gibbs
Owner: RRUFF
Description: euhedral green crystals on perhamite.
Status: The identification of this mineral has been confirmed by X-ray diffraction.
Mineral Group: [ Lipscombite (1) ]

Lipuite
RRUFF ID: R140946
Ideal Chemistry: KNa8Mn3+5Mg0.5(Si12O30(OH)4)(PO4)O2(OH)2·4H2O
Locality: N'Chwaning III mine, Kalahari manganese field, Northern Cape Province, South Africa
Source: Jaco and Tania Janse van Nieuwenhuizen
Owner: RRUFF
Description: Dark reddish brown massive crystalline, associated with sugilite (R130754)
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ Not in a structural group (133) ]

Liroconite
RRUFF ID: R050535
Ideal Chemistry: Cu2+2AlAs5+O4(OH)4·4H2O
Locality: Wheal Gorland, St. Day, Cornwall, England
Source: University of Arizona Mineral Museum 291
Owner: RRUFF
Description: Blue tabular crystals
Status: The identification of this mineral has been confirmed by X-ray diffraction.
Mineral Group: [ Liroconite (1) ]

Liskeardite
RRUFF ID: R060768
Ideal Chemistry: (Al,Fe3+)32(As5+O4)18(OH)42(H2O)22·52H2O
Locality: Penberthy Croft mine, St. Hilary, Cornwall, England
Source: Michael Scott S100935
Owner: RRUFF
Description: White fibrous earthy crust
Status: The identification of this mineral is not yet confirmed.

Litharge
RRUFF ID: R060959
Ideal Chemistry: Pb2+O
Locality: Langban, Filipstad, Varmland, Sweden
Source: Michael Scott S101289
Owner: RRUFF
Description: Red to red-orange crusts associated with black jacobsite and calcite
Status: The identification of this mineral is not yet confirmed.

Lithiomarsturite
RRUFF ID: R100094
Ideal Chemistry: LiCaMn2+3Si5O14(OH)
Locality: Foote mine, Kings Mountain, North Carolina, USA
Source:
Owner: RRUFF
Description: Tan colored prismatic crystals, associated with brannockite, fluorapatite, albite, bavenite, and pyrite
Status: The identification of this mineral has been confirmed by single-crystal X-ray diffraction.
Mineral Group: [ Rhodonite (16) ]

Lithiophilite
RRUFF ID: R070303
Ideal Chemistry: LiMn2+PO4
Locality: Vittaniemi, Erajarvi, Orivesi, Etela-Suomen Laani, Finland
Source: James Shigley
Owner: RRUFF
Description: Yellowish brown massive associated with muscovite
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ Olivine (61) ]
Quick search: [ All Lithiophilite samples (2) ]

Lithiophilite
RRUFF ID: R100096
Ideal Chemistry: LiMn2+PO4
Locality: Foote mine, Kings Mountain, North Carolina, USA
Source:
Owner: RRUFF
Description: Parallel aggregate of pale pink acicular crystals, associated with quartz, muscovite, and elongated platy bertrandite, R110025.
Status: The identification of this mineral has been confirmed by single-crystal X-ray diffraction.
Mineral Group: [ Olivine (61) ]
Quick search: [ All Lithiophilite samples (2) ]

Lithiophorite
RRUFF ID: R070083
Ideal Chemistry: (Al,Li)Mn4+O2(OH)2
Locality: Sausalito Road Quarry, Sausalito, Marine County, California, USA
Source: James Shigley
Owner: RRUFF
Description: Aggregates of shiny black spheres
Status: The identification of this mineral is not yet confirmed.

Lithiophosphate
RRUFF ID: R100092
Ideal Chemistry: Li3PO4
Locality: Cachoeira mine, Itinga, Minas Gerais, Brazil
Source: Luiz Menezes
Owner: RRUFF
Description: Colorless fragments and prismatic crystals
Status: The identification of this mineral has been confirmed by single-crystal X-ray diffraction.

Lithiotantite
RRUFF ID: R100165
Ideal Chemistry: LiTa5+3O8
Locality: Murundu mine, Jenipapo district, Itinga, Minas Gerais, Brazil
Source: Luiz Menezes
Owner: RRUFF
Description: Brown bladed crystals associated with reddish brown prismatic tantalite, and black cassiterite. Used in the Menezes et al (2012) study.
Status: The identification of this mineral has been confirmed by single-crystal X-ray diffraction.
Mineral Group: [ Columbite (32) ]

Litidionite
RRUFF ID: R130088
Ideal Chemistry: KNaCu2+Si4O10
Locality: Mt Vesuvius, Napoli, Italy
Source: Rock Currier
Owner: RRUFF
Description: Blue to green glassy, massive. The two larger fragments are from the 1880 eruption. The smaller fragment is from 1873.
Status: The identification of this mineral has been confirmed by single-crystal X-ray diffraction.
Mineral Group: [ Litidionite (3) ]

Liudongshengite
RRUFF ID: R180016
Ideal Chemistry: Zn2+4Cr3+2(OH)12(CO3)·3H2O
Locality: 79 mine, Gila Co., Arizona, USA
Source: Ron Gibbs
Owner: RRUFF
Description: Pinkish hexagonal thin platy crystals, associated with cerussite, malachite, rosasite, hemimorphite, mimetite, wulfenite, fornacite, and rarely linarite and kuksite. This is the type specimen.
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ Hydrotalcite (22) ]

Livingstonite
RRUFF ID: R050427
Ideal Chemistry: Hg2+Sb3+4S2-6(S2)2-
Locality: Huitzuco, Guerrero, Mexico
Source: University of Arizona Mineral Museum 13426
Owner: RRUFF
Description: Aggregate of blackish-gray elongated crystals
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Quick search: [ All Livingstonite samples (2) ]

Livingstonite
RRUFF ID: R050453
Ideal Chemistry: Hg2+Sb3+4S2-6(S2)2-
Locality: Huitzuco, Guerrero, Mexico
Source: University of Arizona Mineral Museum 13667
Owner: RRUFF
Description: Aggregate of gray columnar crystals
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Quick search: [ All Livingstonite samples (2) ]

Lizardite
RRUFF ID: R060006
Ideal Chemistry: Mg3Si2O5(OH)4
Locality: Snarum, Norway
Source: University of Arizona Mineral Museum 2896
Owner: RRUFF
Description: Green blebs of fine-grained serpentine habit, polytype 1T, associated with pearly hydrotalcite
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Mineral Groups: [ serpentine (12) ] [ Clay (86) ]

Lobanovite
RRUFF ID: R120068
Ideal Chemistry: K2Na(Fe2+4Mg2Na)Ti4+2(Si4O12)2O2(OH)4
Locality: Apatitovaya Mt., Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
Source: Donald Doell
Owner: RRUFF
Description: Massive transparent golden sheets associated with light green aegirine
Status: The identification of this mineral has been confirmed only by single crystal X-ray diffraction.
Mineral Groups: [ astrophyllite (11) ] [ Devitoite (2) ]

Lokkaite-(Y)
RRUFF ID: R061092
Ideal Chemistry: CaY4(CO3)7·9H2O
Locality: Mitsukoshi, Hizen-cho, Karatsu City, Saga Prefecture, Japan
Source: Marcus Origlieri
Owner: RRUFF
Description: Pale pink radial aggregate of blades
Status: The identification of this mineral is not yet confirmed.
Mineral Group: [ Tengerite (3) ]

Löllingite
RRUFF ID: R060185
Ideal Chemistry: Fe3+(As2)3-
Locality: MW Claim, Seagull Batholith, Cassiar Mountains, Yukon, Canada
Source: Lloyd Twaites
Owner: RRUFF
Description: Steel-gray metallic fragments
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Mineral Group: [ Lollingite (8) ]
Quick search: [ All Löllingite samples (3) ]

Löllingite
RRUFF ID: R060668
Ideal Chemistry: Fe3+(As2)3-
Locality: Aghbar near Bou-Azzer, Morocco
Source: Michael Scott S101325
Owner: RRUFF
Description: Gray metallic spears radiating in spherical aggregates, associated with arsenopyrite and skutterudite
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ Lollingite (8) ]
Quick search: [ All Löllingite samples (3) ]

Löllingite
RRUFF ID: R070592
Ideal Chemistry: Fe3+(As2)3-
Locality: Ebisu mine, Hirukawa, Gifu Prefecture, Honshu, Japan
Source: James Shigley
Owner: RRUFF
Description: Steel gray massive associated with quartz
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ Lollingite (8) ]
Quick search: [ All Löllingite samples (3) ]

Lombardoite
RRUFF ID: R220033
Ideal Chemistry: Ba2Mn3+(As5+O4)2(OH)
Locality: Valletta mine, Maira Valley, Piedmont, Italy
Source: Fernando Cámara
Owner: Fernando Cámara
Description: Dark red platy tablets associated with quartz. Type sample from Cámara et al (2022)
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Mineral Group: [ Brackebuschite (17) ]

Lomonosovite
RRUFF ID: R070465
Ideal Chemistry: Na6Na2Ti4+2Na2Ti4+2(Si2O7)2(PO4)2O4
Locality: Apatitovyi Tsirk (Apatite Circus), Rasvumchorr Mountain, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
Source: Michael Scott S105790
Owner: RRUFF
Description: Light tan platy crystals associated with orthoclase and lamprophyllite
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ Epistolite (9) ]

Loomisite
RRUFF ID: R210017
Ideal Chemistry: Ba[Be2P2O8]·H2O
Locality: Big Chief mine, Pennington County, South Dakota, USA
Source: Tom Loomis TL256A
Owner: RRUFF
Description: White acicular divergent crystals, associated with white bladed dondoellite, and yellow needle earlshannonite.
Status: unconfirmed

Loparite-(Ce)
RRUFF ID: R070251
Ideal Chemistry: (Na,Ce3+,Sr)(Ce3+,Th4+)(Ti4+,Nb5+)2O6
Locality: Maly Mannepakhk Mt (Malyi Mannepakhk Mt), Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
Source: Michael Scott S105531
Owner: RRUFF
Description: Black interpenetrating cubes associated with green aegirine and sugary microcline
Status: The identification of this mineral is not yet confirmed.
Mineral Group: [ Perovskite (44) ]

Lópezite
RRUFF ID: R070043
Ideal Chemistry: K2Cr6+2O7
Locality: Synthetic, made in the Czech Republic
Source: Michael Scott S101397
Owner: RRUFF
Description: Red single crystal
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.

Lorándite
RRUFF ID: R060961
Ideal Chemistry: Tl1+As3+S2-2
Locality: Allchar, Macedonia
Source: Michael Scott S101334
Owner: RRUFF
Description: Deep red prisms or tabular crystals, associated with prismatic realgar.
Status: The identification of this mineral has been confirmed by single-crystal X-ray diffraction.
Quick search: [ All Lorándite samples (2) ]

Lorándite
RRUFF ID: R110055
Ideal Chemistry: Tl1+As3+S2-2
Locality: Xingren County, Qianxi'nan Autonomous Prefecture, Guizhou Province, China
Source: Don Doell
Owner: RRUFF
Description: Red platy crystals and cleavages
Status: The identification of this mineral has been confirmed by single-crystal X-ray diffraction.
Quick search: [ All Lorándite samples (2) ]

Lorenzenite
RRUFF ID: R060960
Ideal Chemistry: Na2Ti4+2O3(Si2O6)
Locality: Khibiny Massif, Kola Peninsula, Russia
Source: Michael Scott S101383
Owner: RRUFF
Description: Dark brown prismatic single crystal
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Quick search: [ All Lorenzenite samples (2) ]

Lorenzenite
RRUFF ID: R130051
Ideal Chemistry: Na2Ti4+2O3(Si2O6)
Locality: Mont Saint-Hilaire, Rouville RCM, Monteregie, Quebec, Canada
Source: Don Doell
Owner: RRUFF
Description: A jumbled mass of colorless hair-like crystals associated with black arfvedsonite and white microcline
Status: The identification of this mineral has been confirmed by single-crystal X-ray diffraction.
Quick search: [ All Lorenzenite samples (2) ]

Lotharmeyerite
RRUFF ID: R060862
Ideal Chemistry: CaZn2+2(As5+O4)2·2H2O
Locality: Mapimi, Durango, Mexico
Source: Michael Scott S100871
Owner: RRUFF
Description: Dark reddish brown bladed crystals, crystal structure is reported by Yang et al (2012)
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ Natrochalcite (13) ]

Lourenswalsite
RRUFF ID: R060468
Ideal Chemistry: (K,Ba)2Ti4+4(Si,Al)6O14(OH)12
Locality: Diamond Jo Quarry, Magnet Cove, Hot Spring County, Arkansas, USA
Source: Michael Scott S100196
Owner: RRUFF
Description: Rosettes of gray platy crystals
Status: The identification of this mineral is not yet confirmed.

Lovozerite
RRUFF ID: R080107
Ideal Chemistry: Na3CaZr4+Si6O15(OH)3
Locality: Mont Saint-Hilaire, Quebec, Canada
Source: William W. Pinch
Owner: RRUFF
Description: Small tan blocky crystals associated with sodalite and microcline
Status: The identification of this mineral has been confirmed only by single crystal X-ray diffraction.
Mineral Groups: [ Lovozerite (3) ] [ Zirsinalite–Lovozerite (3) ]
Quick search: [ All Lovozerite samples (2) ]

Lovozerite
RRUFF ID: R120159
Ideal Chemistry: Na3CaZr4+Si6O15(OH)3
Locality: Poudrette quarry, Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada
Source: Donald Doell
Owner: RRUFF
Description: Yellow massive on ussingite (R140806).
Status: The identification of this mineral has been confirmed only by single crystal X-ray diffraction.
Mineral Groups: [ Lovozerite (3) ] [ Zirsinalite–Lovozerite (3) ]
Quick search: [ All Lovozerite samples (2) ]

Luanheite
RRUFF ID: R060677
Ideal Chemistry: Ag3Hg
Locality: Elisa de Bordos mine, Tierra Amarilla, Chile
Source: Bob Jenkins
Owner: RRUFF
Description: White and black tarnish massive mixture
Status: The identification of this mineral is not yet confirmed.

Ludjibaite
RRUFF ID: R060413
Ideal Chemistry: Cu2+5(PO4)2(OH)4
Locality: Sossego, Carajas, Brazil
Source: Bob Jenkins
Owner: RRUFF
Description: Bluish-green groups of colliform aggregates
Status: The identification of this mineral is not yet confirmed.
Mineral Group: [ Medenbachite (1) ]

Ludlamite
RRUFF ID: R040152
Ideal Chemistry: Fe2+3(PO4)2·4H2O
Locality: Cobalt, Lemhi County, Idaho, USA
Source: University of Arizona Mineral Museum 15641
Owner: RRUFF
Description: Green tabular single crystals
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Quick search: [ All Ludlamite samples (3) ]

Ludlamite
RRUFF ID: R060485
Ideal Chemistry: Fe2+3(PO4)2·4H2O
Locality: Blackbird District, Lehmi County, Idaho, USA
Source: Michael Scott S100357
Owner: RRUFF
Description: Green tabular crystals associated with siderite, pyrite and quartz
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Quick search: [ All Ludlamite samples (3) ]

Ludlamite
RRUFF ID: R090071
Ideal Chemistry: Fe2+3(PO4)2·4H2O
Locality: Cigana Mine (ex-Jocão Mine), Galiléia, Minas Gerais Brazil
Source: Royal Ontario Museum M54960
Owner: RRUFF
Description: Groups of colorless tabular crystals on reddish-brown reddingite R090069, associated with pink hureaulite R090070.
Status: The identification of this mineral has been confirmed only by single crystal X-ray diffraction.
Quick search: [ All Ludlamite samples (3) ]

Ludlockite
RRUFF ID: R100176
Ideal Chemistry: Pb2+Fe3+4As3+10O22
Locality: Tsumeb, Namibia
Source: William W. Pinch
Owner: RRUFF
Description: Red fibrous crystals that display significant flexibility
Status: The identification of this mineral has been confirmed by single-crystal X-ray diffraction.

Ludwigite
RRUFF ID: R060010
Ideal Chemistry: Mg2Fe3+O2(BO3)
Locality: Victoria Quarry, Riverside, California, USA
Source: University of Arizona Mineral Museum 9094
Owner: RRUFF
Description: Black elongated prismatic crystals, associated with pale yellow clinohumite on white calcite matrix
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Mineral Group: [ Ludwigite (5) ]
Quick search: [ All Ludwigite samples (2) ]

Ludwigite
RRUFF ID: R060844
Ideal Chemistry: Mg2Fe3+O2(BO3)
Locality: Crestmore, California, USA
Source: Bob Jenkins
Owner: RRUFF
Description: Black elongated prismatic crystals
Status: The identification of this mineral has been confirmed only by single crystal X-ray diffraction.
Mineral Group: [ Ludwigite (5) ]
Quick search: [ All Ludwigite samples (2) ]

Lueshite
RRUFF ID: R090025
Ideal Chemistry: NaNb5+O3
Locality: Lueshe carbonatite, Kivu Province, Democratic Republic of the Congo
Source: Karl Russ
Owner: RRUFF
Description: Black cubes
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ Perovskite (44) ]

Luetheite
RRUFF ID: R060088
Ideal Chemistry: Cu2+Al(As5+O4)(OH)2
Locality: Alum Gulch, Patagonia, Arizona, USA
Source: Andy Anderson
Owner: RRUFF
Description: Pale blue fine-grained
Status: The identification of this mineral has been confirmed only by chemical analysis
Mineral Group: [ Chenevixite (3) ]

Lulzacite
RRUFF ID: R110147
Ideal Chemistry: Sr2Fe2+3Al4(PO4)4(OH)10
Locality: Saint-Aubin-des-Châteaux, Loire-Atlantique, France
Source: Olivier Pourret
Owner: RRUFF
Description: Gray glassy and massive, associated with siderite and pyrite
Status: The identification of this mineral has been confirmed only by single crystal X-ray diffraction.

Lüneburgite
RRUFF ID: R140143
Ideal Chemistry: Mg3[B2(OH)6(PO4)2]·6H2O
Locality: Lüneburger Kalkberg, Lüneburg, Lower Saxony, Germany
Source: Rock Currier
Owner: RRUFF
Description: Massive, vitreous, white with silky sheen, with minor limonitic staining
Status: The identification of this mineral has been confirmed only by single crystal X-ray diffraction.

Luzonite
RRUFF ID: R060390
Ideal Chemistry: Cu3AsS2-4
Locality: Bern-Shan Pit, Chinkuashi mine, Taipei, Taiwan, Republic of China
Source: Michael Scott S100181
Owner: RRUFF
Description: Black coarse massive with two directions of obvious cleavage
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Groups: [ Stannite (11) ] [ Sphalerite (35) ]
Quick search: [ All Luzonite samples (2) ]

Luzonite
RRUFF ID: R070247
Ideal Chemistry: Cu3AsS2-4
Locality: Huaron Mining District, San Jose de Huayllay district, Cerro de Pasco, Alcides Carrión Province, Pasco department, Peru
Source: Michael Scott S105151
Owner: RRUFF
Description: Black metallic crystals with pinkish hue. The electron microscope image shows three distinct fine-scale phases related to As and Sb content
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Groups: [ Stannite (11) ] [ Sphalerite (35) ]
Quick search: [ All Luzonite samples (2) ]

Macdonaldite
RRUFF ID: R060770
Ideal Chemistry: BaCa4Si16O36(OH)2·10H2O
Locality: Rush Creek, Fresno County, California, USA
Source: Michael Scott S101090
Owner: RRUFF
Description: Radiating aggregates of white platy crystals
Status: The identification of this mineral is not yet confirmed.
Mineral Group: [ Rhodesite (5) ]

Macfallite
RRUFF ID: R060391
Ideal Chemistry: Ca2Mn3+3(SiO4)(Si2O7)(OH)3
Locality: near Manganese Lake, Copper Harbor, Keweenaw County, Michigan, USA
Source: Michael Scott S100092
Owner: RRUFF
Description: Reddish-brown radial aggregate of bladed crystals associated with braunite, quartz, calcite
Status: The identification of this mineral has been confirmed by single-crystal X-ray diffraction.

Mackayite
RRUFF ID: R060592
Ideal Chemistry: Fe3+Te4+2O5(OH)
Locality: Lone Pine mine, Lone Pine Hill area, Wilcox District, Catron County, New Mexico, USA
Source: Michael Scott S100792
Owner: RRUFF
Description: Greenish-brown octahedral crystals associated with quartz
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.

Mackinawite
RRUFF ID: R060388
Ideal Chemistry: (Fe,Ni)1-1.07S
Locality: Hitura, Finland
Source: Michael Scott S100089
Owner: RRUFF
Description: Bronze thin tabular crystals in parallel packing
Status: The identification of this mineral is not yet confirmed.
Quick search: [ All Mackinawite samples (2) ]

Mackinawite
RRUFF ID: R070302
Ideal Chemistry: (Fe,Ni)1-1.07S
Locality: Wannaway Prospect, near Kalgoorlie, Western Australia, Australia
Source: James Shigley
Owner: RRUFF
Description: Bronze metallic massive, drill core
Status: The identification of this mineral is not yet confirmed.
Quick search: [ All Mackinawite samples (2) ]

Macquartite
RRUFF ID: R210020
Ideal Chemistry: Cu2+2Pb2+7(Cr6+O4)4(SiO4)2(OH)2
Locality: Mammoth-Sth. Anthony M., Tiger, Pinal County, Arizona, USA
Source: Bob Jenkins
Owner: RRUFF
Description: Orange euhedral prismatic crystals in quartz vugs, associated with blue-green prismatic diaboleite, yellow-orange platy wulfenite, dark grey vauquelinite.
Status: The identification of this mineral has been confirmed by X-ray diffraction.

Magadiite
RRUFF ID: R060994
Ideal Chemistry: Na2Si14O28(OH)2·8H2O
Locality: Trinity Lake, Trinity County, California, USA
Source: Bob Jenkins
Owner: RRUFF
Description: White compacted fine-grained silt
Status: The identification of this mineral is not yet confirmed.

Maghemite
RRUFF ID: R140712
Ideal Chemistry: (Fe3+0.670.33)Fe3+2O4
Locality: Katzenbuckel, Eberbach, Odenwald, Baden-Württemberg, Germany
Source: Rock Currier
Owner: RRUFF
Description: Black aggregate of small to fine grains. Fd3m symmetry
Status: The identification of this mineral has been confirmed only by single crystal X-ray diffraction.
Mineral Group: [ Spinel (66) ]

Magnesio-fluoro-arfvedsonite
RRUFF ID: R050515
Ideal Chemistry: NaNa2(Mg4Fe3+)Si8O22F2
Locality: unknown
Source: Frank Hawthorne
Owner: RRUFF
Description: Numerous small dark green fragments
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Mineral Group: [ amphibole (107) ]

Magnesio-fluoro-hastingsite
RRUFF ID: R141082
Ideal Chemistry: NaCa2(Mg4Fe3+)(Si6Al2)O22F2
Locality: Caspar quarry, Bellerberg volcano, Mayen, Eifel, Germany
Source: Ch. and H. Schäfer
Owner: RRUFF
Description: Euhedral brown crystal embedded in matrix
Status: The identification of this mineral has been confirmed only by single crystal X-ray diffraction.
Mineral Group: [ amphibole (107) ]
Quick search: [ All Magnesio-fluoro-hastingsite samples (3) ]

Magnesio-fluoro-hastingsite
RRUFF ID: R141098
Ideal Chemistry: NaCa2(Mg4Fe3+)(Si6Al2)O22F2
Locality: Uroi Hill (Arany Hill), Simeria, Hunedoara Co., Romania
Source: Ch. and H. Schäfer
Owner: RRUFF
Description: Prismatic brown to orange-brown crystals
Status: The identification of this mineral has been confirmed only by single crystal X-ray diffraction.
Mineral Group: [ amphibole (107) ]
Quick search: [ All Magnesio-fluoro-hastingsite samples (3) ]

Magnesio-fluoro-hastingsite
RRUFF ID: R141099
Ideal Chemistry: NaCa2(Mg4Fe3+)(Si6Al2)O22F2
Locality: Mt. Vesuvius, Naples, Campania, Italy
Source: Ch. and H. Schäfer
Owner: RRUFF
Description: Prismatic brown crystals
Status: The identification of this mineral has been confirmed only by single crystal X-ray diffraction.
Mineral Group: [ amphibole (107) ]
Quick search: [ All Magnesio-fluoro-hastingsite samples (3) ]
Magnesio-foitite
RRUFF ID: X050186
Ideal Chemistry: ◻(Mg2Al)Al6(Si6O18)(BO3)3(OH)3OH
Locality: Honshu, Japan
Source: Caltech
Owner: Caltech
Description:
Status: The identification of this mineral is not yet confirmed.
Mineral Group: [ tourmaline (49) ]

Magnesio-hastingsite
RRUFF ID: R040010
Ideal Chemistry: NaCa2(Mg4Fe3+)Si6Al2O22(OH)2
Locality: Amity, New York, USA
Source: University of Arizona Mineral Museum 4231
Owner: RRUFF
Description: Group of black prismatic crystals
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Mineral Group: [ amphibole (107) ]
Quick search: [ All Magnesio-hastingsite samples (3) ]

Magnesio-hastingsite
RRUFF ID: R070145
Ideal Chemistry: NaCa2(Mg4Fe3+)Si6Al2O22(OH)2
Locality: Niaslo, Basha Valley, Baltistan, Northern Areas, Pakistan
Source: William W. Pinch
Owner: RRUFF
Description: Black cleavage fragments
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ amphibole (107) ]
Quick search: [ All Magnesio-hastingsite samples (3) ]

Magnesio-hastingsite
RRUFF ID: R070288
Ideal Chemistry: NaCa2(Mg4Fe3+)Si6Al2O22(OH)2
Locality: Dallas Gem Mine (Gem Mine; Benitoite Mine), New Idria District, San Benito County, California, USA
Source: Michael Scott S104903
Owner: RRUFF
Description: Dark brown to black prismatic crystals frozen in albite
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ amphibole (107) ]
Quick search: [ All Magnesio-hastingsite samples (3) ]

Magnesio-riebeckite
RRUFF ID: R060037
Ideal Chemistry: ◻Na2(Mg3Fe3+2)Si8O22(OH)2
Locality: Pollone, Piedmont, Italy
Source: University of Arizona Mineral Museum 4236
Owner: RRUFF
Description: Black bladed single crystals embedded in a white matrix of calcite
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Mineral Group: [ amphibole (107) ]
Quick search: [ All Magnesio-riebeckite samples (2) ]

Magnesio-riebeckite
RRUFF ID: R070002
Ideal Chemistry: ◻Na2(Mg3Fe3+2)Si8O22(OH)2
Locality: Alto Chapare, Cochabamba Department, Bolivia
Source: Michael Scott S100846
Owner: RRUFF
Description: Light bluish gray fibrous cloth-like fabric
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Mineral Group: [ amphibole (107) ]
Quick search: [ All Magnesio-riebeckite samples (2) ]

Magnesioalterite
RRUFF ID: R180015
Ideal Chemistry: Mg2Fe3+4(S6+O4)4((C2)6+O4)2(OH)4·17H2O
Locality: Near Marble Canyon, Coconino County, Arizona, USA
Source: Malcom Alter
Owner: RRUFF
Description: Isolated or aggregates of yellow brown prismatic crystals on petrified wood, associated with greenish prismatic alterite, gypsum, alunogen, and sulfur. Type sample.
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Groups: [ Alterite (2) ] [ Oxalate (13) ]

Magnesioaubertite
RRUFF ID: R060344
Ideal Chemistry: MgAl(S6+O4)2Cl·14H2O
Locality: Grotta de Faraglione, Vulcano, Italy
Source: Michael Scott S100113
Owner: RRUFF
Description: Blue massive with a parallel fibrous texture associated with white pickeringite, co-type specimen
Status: The identification of this mineral has been confirmed only by single crystal X-ray diffraction.
Mineral Group: [ Aubertite (2) ]

Magnesiocarpholite
RRUFF ID: R140873
Ideal Chemistry: MgAl2Si2O6(OH)4
Locality: Sengelbach valley, Biesenrode, Wippra Metamorphic Zone, Harz, Saxony-Anhalt, Germany
Source: Stefan Schorn
Owner: RRUFF
Description: Green to gray fibers
Status: The identification of this mineral has been confirmed only by single crystal X-ray diffraction.
Mineral Group: [ Carpholite (3) ]

Magnesiochlorophoenicite
RRUFF ID: R140719
Ideal Chemistry: Mg3Zn2+2As5+O4(OH,O)6
Locality: Sterling mine, Sterling Hill, Ogdensburg, Franklin Mining District, Sussex County, New Jersey, USA
Source: Rock Currier
Owner: RRUFF
Description: Radial tufts of vitreous white acicular crystals on typical Franklin Hill zinc ore. The crystals are twinned by a 2-fold axis parallel to a*.
Status: The identification of this mineral has been confirmed only by single crystal X-ray diffraction.
Mineral Group: [ Chlorophoenicite (2) ]

Magnesiochromite
RRUFF ID: R050399
Ideal Chemistry: MgCr3+2O4
Locality: Troodos Mountains, Cyprus
Source: Andy McCarthy
Owner: RRUFF
Description: Black grains
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Mineral Group: [ Spinel (66) ]
Quick search: [ All Magnesiochromite samples (3) ]

Magnesiochromite
RRUFF ID: R060796
Ideal Chemistry: MgCr3+2O4
Locality: State Line Chrome mine (Low's mine), Cecil County, Maryland, USA
Source: California Institute of Technology 10576
Owner: RRUFF
Description: Black massive
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Mineral Group: [ Spinel (66) ]
Quick search: [ All Magnesiochromite samples (3) ]

Magnesiochromite
RRUFF ID: R060797
Ideal Chemistry: MgCr3+2O4
Locality: Benbow mine, Stillwater Complex, Mount Wood area, Stillwater County, Montana, USA
Source: California Institute of Technology 11227
Owner: RRUFF
Description: Black granular massive
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Mineral Group: [ Spinel (66) ]
Quick search: [ All Magnesiochromite samples (3) ]

Magnesiocopiapite
RRUFF ID: R060155
Ideal Chemistry: MgFe3+4(S6+O4)6(OH)2·20H2O
Locality: Denver mine, Santa Cruz County, Arizona, USA
Source: University of Arizona Mineral Museum 12789
Owner: RRUFF
Description: Yellow fine-grained efflorescence
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Mineral Group: [ Copiapite (4) ]

Magnesiocoulsonite
RRUFF ID: R070218
Ideal Chemistry: MgV3+2O4
Locality: Pereval Marble Quarry, Sludyanka (Slyudyanka), Baikal area, Buriatia (Buryatia) Republic, Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia
Source: Michael Scott S100447
Owner: RRUFF
Description: Black grains with internal hints of red
Status: The identification of this mineral has been confirmed only by single crystal X-ray diffraction.
Mineral Group: [ Spinel (66) ]

Magnesioferrite
RRUFF ID: R060869
Ideal Chemistry: MgFe3+2O4
Locality: Langban, Filipstad, Varmland, Sweden
Source: Michael Scott S101024
Owner: RRUFF
Description: Black semimetallic massive
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ Spinel (66) ]
Quick search: [ All Magnesioferrite samples (2) ]

Magnesioferrite
RRUFF ID: R070127
Ideal Chemistry: MgFe3+2O4
Locality: Langban, Filipstad, Varmland, Sweden
Source: Michael Scott S100406
Owner: RRUFF
Description: Black poorly formed octahedral crystals with deep red highlites, associated with hematite and calcite
Status: The identification of this mineral has been confirmed only by single crystal X-ray diffraction.
Mineral Group: [ Spinel (66) ]
Quick search: [ All Magnesioferrite samples (2) ]

Magnesiohulsite
RRUFF ID: R070223
Ideal Chemistry: Mg2Fe3+O2(BO3)
Locality: Iten'yurginskoye Deposit, Chukotka (Tchukotka) Okrug, Chukot Peninsula, Far-Eastern Region, Russia
Source: Michael Scott S100449
Owner: RRUFF
Description: Radiating black fibrous crystals
Status: The identification of this mineral is not yet confirmed.
Mineral Group: [ Hulsite (4) ]

Magnesiokoritnigite
RRUFF ID: R150002
Ideal Chemistry: Mg(As5+O3OH)·H2O
Locality: Torrecillias mine, Sala Grande, Tamarugal Province, Chile
Source: Bob Jenkins
Owner: RRUFF
Description: Colorless tabular crystals
Status: The identification of this mineral is not yet confirmed.
Mineral Group: [ Koritnigite (3) ]

Magnesiotaaffeite-2N'2S
RRUFF ID: R070555
Ideal Chemistry: Mg3BeAl8O16
Locality: Tunduru, Tanzania
Source: www.multicolour.com
Owner: RRUFF
Description: Slightly pink cut gemstone, 0.15 ct.
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Quick search: [ All Magnesiotaaffeite-2N'2S samples (3) ]

Magnesiotaaffeite-2N'2S
RRUFF ID: X090001
Ideal Chemistry: Mg3BeAl8O16
Locality: Ratnapura, Sri Lanka
Source: William W. Pinch
Owner: Bill Pinch
Description: Dark grey with a hint of purple, flattened tabular hexagonal crystal
Status: The identification of this mineral has been confirmed by single-crystal X-ray diffraction.
Quick search: [ All Magnesiotaaffeite-2N'2S samples (3) ]

Magnesiotaaffeite-2N'2S
RRUFF ID: R090035
Ideal Chemistry: Mg3BeAl8O16
Locality: Ratnapura District, Sri-Lanka
Source: William W. Pinch
Owner: RRUFF
Description: Rounded hexagonal purple crystal with pyramidal terminations
Status: The identification of this mineral has been confirmed by single-crystal X-ray diffraction.
Quick search: [ All Magnesiotaaffeite-2N'2S samples (3) ]

Magnesiotaaffeite-6N'3S
RRUFF ID: X070005
Ideal Chemistry: Mg2BeAl6O12
Locality: Tunduru, Tanzania
Source: www.multicolour.com
Owner: www.multicolour.com
Description: Pale lavendar cut gemstone, 0.65 cts, formerly known as musgravite-18R
Status: The identification of this mineral has been confirmed by single-crystal X-ray diffraction.
Quick search: [ All Magnesiotaaffeite-6N'3S samples (2) ]

Magnesiotaaffeite-6N'3S
RRUFF ID: R090019
Ideal Chemistry: Mg2BeAl6O12
Locality: Ratnapura District, Sri Lanka
Source: William W. Pinch
Owner: Bill Pinch
Description: Greyish purple flattened tabular hexagonal crystal
Status: The identification of this mineral has been confirmed by single-crystal X-ray diffraction.
Quick search: [ All Magnesiotaaffeite-6N'3S samples (2) ]

Magnesite
RRUFF ID: R040114
Ideal Chemistry: MgCO3
Locality: Snarum, Norway
Source: University of Arizona Mineral Museum 7562
Owner: RRUFF
Description: Tan colored cleavage fragment
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Mineral Group: [ Calcite (36) ]
Quick search: [ All Magnesite samples (5) ]
Magnesite
RRUFF ID: X050115
Ideal Chemistry: MgCO3
Locality: Serra Das Egnas, Brazil
Source: CIT 2123
Owner: Caltech
Description:
Status: The identification of this mineral has been determined only by Raman spectroscopy
Mineral Group: [ Calcite (36) ]
Quick search: [ All Magnesite samples (5) ]
Magnesite
RRUFF ID: X050116
Ideal Chemistry: MgCO3
Locality: Gustine Merced County, California, USA
Source: CIT 1450
Owner: Caltech
Description:
Status: The identification of this mineral has been determined only by Raman spectroscopy
Mineral Group: [ Calcite (36) ]
Quick search: [ All Magnesite samples (5) ]
Displaying: 2301 - 2400 ‹‹ Prev   1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 ‹24› 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43   Next ››
4216 Records Found
Search Again: