Mineral Evolution Database

Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.

Mineral locality data provided by mindat.org

The Mineral Evolution database is currently under development.

The goal of this page is to present localities at which the mineral is found, and estimates of the oldest possible geologic age of the minerals at these localities.

Locality Name:
Hewitt Gem Quarry (Herb's Gem Quarry; Sawmill Quarry), Haddam, Middlesex Co., Connecticut, USA

mindat Locality ID: 23091
mindat URL: http://www.mindat.org/loc-23091.html

Tectonic Settings:

Total number of sublocalities beneath "Hewitt Gem Quarry (Herb's Gem Quarry; Sawmill Quarry), Haddam, Middlesex Co., Connecticut, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 41°27'10"N
Longitude: 72°30'38"W
Decimal Degree (lat, lon): 41.452777777778,-72.510555555556

A	This mineral is Anthropogenic.
G	This mineral is directly dated.
B	This mineral is reported as having this age.
Y	This mineral is using an age reported as an element mineralization period.
O	This mineral is using an age calculated from all data at the locality.
R	The age displayed for this mineral originates from a different, non-child locality.
P	The age displayed for this mineral is the range of ages for this mineral at all of this locality's children.
	This mineral's age has not yet been recorded.

Amorphous	Analcime	Apatite	Beryl	Bismutite	Chlorite	Clay	Columbite	Feldspar	Fluorite
Garnet	Meta-autunite	Mica	None	Not in a structural group	Quartz	Spinel	Stibnite	Tourmaline	Zircon

Albite ()*	Almandine ()*	Annite ()*	Bavenite ()*	Bertrandite ()*
Beryl ()*	Bismuthinite ()*	Bismutite ()*	Bismutotantalite ()*	Cookeite ()*
Elbaite ()*	Fluorapatite ()*	Fluorite ()*	Maghemite ()*	Magnetite ()*
Meta-autunite ()*	Metatorbernite ()*	Microcline ()*	Muscovite ()*	Opal ()*
Phlogopite ()*	Pollucite ()*	Quartz ()*	Schorl ()*	Sillimanite ()*
Spessartine ()*	Tantalite-(Mn) ()*	Uraninite ()*	Zircon ()*

This Mineral list contains entries from this locality, including sub-localities. Minerals in bold are reported by mindat.org as occurring directly at this locality, and do not occur at any children (sublocalities) of this locality.

Elements at this locality, including sub-localities: Al B Be Bi C Ca Cs Cu F Fe H K Li Mg Mn Na O P S Si Ta U Zr

Elements from minerals reported directly at this locality: Al B Be Bi C Ca Cs Cu F Fe H K Li Mg Mn Na O P S Si Ta U Zr

Structural Groups for minerals in this locality:
Amorphous Analcime Apatite Beryl Bismutite Chlorite Clay Columbite Feldspar Fluorite
Garnet Meta-autunite Mica None Not in a structural group Quartz Spinel Stibnite Tourmaline Zircon

29 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	# of localities containing mineral
Albite ()*	Feldspar	Na(AlSi₃O₈)	8803
Almandine ()*	Garnet	Fe²⁺₃Al₂(SiO₄)₃	2353
Annite ()*	Mica Clay	KFe²⁺₃(AlSi₃O₁₀)(OH)₂	356
Bavenite ()*	None	Ca₄Be_2+xAl_2-xSi₉O_26-x(OH)_2+x (x = 0 to 1)	255
Bertrandite ()*	Not in a structural group	Be₄Si₂O₇(OH)₂	606
Beryl ()*	Beryl	Be₃Al₂Si₆O₁₈	4286
Bismuthinite ()*	Stibnite	Bi₂S₃	1935
Bismutite ()*	Bismutite	Bi₂O₂(CO₃)	716
Bismutotantalite ()*	None	BiTaO₄	23
Cookeite ()*	Chlorite Clay	(Al,Li)₃Al₂(Si,Al)₄O₁₀(OH)₈	181
Elbaite ()*	Tourmaline	Na(Al_1.5Li_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	520
Fluorapatite ()*	Apatite	Ca₅(PO₄)₃F	2740
Fluorite ()*	Fluorite	CaF₂	9617
Maghemite ()*	Spinel	(Fe³⁺_0.67 _0.33)Fe³⁺₂O₄	229
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	14899
Meta-autunite ()*	Meta-autunite	Ca(UO₂)₂(PO₄)₂·6H₂O	388
Metatorbernite ()*	None	Cu(UO₂)₂(PO₄)₂·8H₂O	443
Microcline ()*	Feldspar	K(AlSi₃O₈)	4924
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	17380
Opal ()*	Amorphous	SiO₂·nH₂O	2994
Phlogopite ()*	Mica Clay	KMg₃(AlSi₃O₁₀)(OH)₂	2273
Pollucite ()*	Analcime	Cs(Si₂Al)O₆·nH₂O	140
Quartz ()*	Quartz	SiO₂	61156
Schorl ()*	Tourmaline	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	2705
Sillimanite ()*	Not in a structural group	Al₂SiO₅	1516
Spessartine ()*	Garnet	Mn²⁺₃Al₂(SiO₄)₃	1214
Tantalite-(Mn) ()*	Columbite	Mn²⁺Ta₂O₆	211
Uraninite ()*	Fluorite	UO₂	2718
Zircon ()*	Zircon	Zr(SiO₄)	5251

No ages have been assigned to this locality yet.

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...