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| 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. |
| Mineral name | Structural Groups | IMA Formula | Max Age (Ma) | Min Age (Ma) | # of Sublocalities containing mineral | LOCALITY IDs, not mindat ids | # of localities containing mineral |
|---|---|---|---|---|---|---|---|
| Actinolite (*) | Amphibole | Ca2(Mg4.5-2.5Fe2+0.5-2.5)Si8O22(OH)2 | 1 | 219572 | 3419 | ||
| Albite (*) | Feldspar | Na(AlSi3O8) | 1 | 219572 | 8803 | ||
| Aurichalcite (*) | None | (Zn,Cu)5(CO3)2(OH)6 | 1 | 219572 | 919 | ||
| Axinite-(Fe) (*) | Axinite | Ca4Fe2+2Al4[B2Si8O30](OH)2 | 1 | 219572 | 260 | ||
| Babingtonite (*) | Rhodonite | Ca2Fe2+Fe3+Si5O14(OH) | 1 | 219572 | 161 | ||
| Bornite (*) | None | Cu5FeS4 | 1 | 219572 | 5516 | ||
| Calcite (*) | Calcite | Ca(CO3) | 1 | 219572 | 27770 | ||
| Chalcopyrite (*) | Chalcopyrite | CuFeS2 | 1 | 219572 | 27198 | ||
| Chamosite (*) | Chlorite Clay | (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 | 1 | 219572 | 577 | ||
| Chrysocolla (*) | Allophane | (Cu2-xAlx)H2-xSi2O5(OH)4·nH2O | 1 | 219572 | 3531 | ||
| Clinozoisite (*) | Clinozoisite Epidote | Ca2Al3[Si2O7][SiO4]O(OH) | 1 | 219572 | 1025 | ||
| Epidote (*) | Epidote Clinozoisite | Ca2(Al2Fe3+)[Si2O7][SiO4]O(OH) | 1 | 219572 | 8173 | ||
| Ferro-hornblende (*) | Amphibole | Ca2(Fe2+4Al)(Si7Al)O22(OH)2 | 1 | 219572 | 271 | ||
| Fluorapatite (*) | Apatite | Ca5(PO4)3F | 1 | 219572 | 2740 | ||
| Goethite (*) | Diaspore | FeO(OH) | 1 | 219572 | 7437 | ||
| Hematite (*) | Corundum | Fe2O3 | 1 | 219572 | 14640 | ||
| Ilmenite (*) | Corundum | Fe2+Ti4+O3 | 1 | 219572 | 5433 | ||
| Kamphaugite-(Y) (*) | None | CaY(CO3)2(OH)·H2O | 1 | 219572 | 28 | ||
| Laumontite (*) | Not in a structural group | CaAl2Si4O12·4H2O | 1 | 219572 | 1271 | ||
| Magnetite (*) | Spinel | Fe2+Fe3+2O4 | 1 | 219572 | 14899 | ||
| Malachite (*) | Malachite | Cu2(CO3)(OH)2 | 1 | 219572 | 12537 | ||
| Microcline (*) | Feldspar | K(AlSi3O8) | 1 | 219572 | 4924 | ||
| Montmorillonite (*) | Clay Smectite-vermiculite | (Na,Ca)0.3(Al,Mg)2Si4O10(OH)2·nH2O | 1 | 219572 | 1508 | ||
| Muscovite (*) | Mica Clay | KAl2(Si3Al)O10(OH)2 | 1 | 219572 | 17380 | ||
| Natrolite (*) | Natrolite | Na2(Si3Al2)O10·2H2O | 1 | 219572 | 1236 | ||
| Opal (*) | Amorphous | SiO2·nH2O | 1 | 219572 | 2994 | ||
| Orthoclase (*) | Feldspar | K(AlSi3O8) | 1 | 219572 | 2349 | ||
| Pickeringite (*) | Halotrichite | MgAl2(SO4)4·22H2O | 1 | 219572 | 265 | ||
| Prehnite (*) | Prehnite | Ca2Al(Si3Al)O10(OH)2 | 1 | 219572 | 1898 | ||
| Pyrite (*) | Pyrite | FeS2 | 1 | 219572 | 39462 | ||
| Pyrrhotite (*) | Nickeline | Fe7S8 | 1 | 219572 | 9056 | ||
| Quartz (*) | Quartz | SiO2 | 1 | 219572 | 61156 | ||
| Sphalerite (*) | Sphalerite | ZnS | 1 | 219572 | 21482 | ||
| Stellerite (*) | Stilbite | Ca4(Si28Al8)O72·28H2O | 1 | 219572 | 189 | ||
| Titanite (*) | Titanite | CaTi(SiO4)O | 1 | 219572 | 4899 | ||
| Tremolite (*) | Amphibole | Ca2(Mg5.0-4.5Fe2+0.0-0.5)Si8O22(OH)2 | 1 | 219572 | 2562 |
| Sample | Source Locality | Reference URL |
|---|---|---|
| R080085 | Ashland, Middlesex Co., Massachusetts, USA | https://rruff.info/R080085 |
All locality data graciously provided by mindat.org
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