| 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 | Amphibole | Calcite | Clay | Cristobalite | Mica | None | Orpiment | Rutile | Sphalerite |
| Spinel |
| Chromite (*) | Cinnabar (*) | Cristobalite (*) | Glaucophane (*) | Idrialite (*) |
| Metacinnabar (*) | Muscovite (*) | Opal (*) | Orpiment (*) | Pyrolusite (*) |
| Realgar (*) | Siderite (*) |
| 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 |
|---|---|---|---|---|---|---|---|
| Chromite (*) | Spinel | Fe2+Cr2O4 | 1 | 180315 | 3902 | ||
| Cinnabar (*) | None | HgS | 1 | 180319 | 2600 | ||
| Cristobalite (*) | Cristobalite | SiO2 | 1 | 180319 | 453 | ||
| Glaucophane (*) | Amphibole | Na2(Mg3Al2)Si8O22(OH)2 | 1 | 180320 | 286 | ||
| Idrialite (*) | None | C22H14 | 1 | 180319 | 15 | ||
| Metacinnabar (*) | Sphalerite | HgS | 2 | 180318,180319 | 255 | ||
| Muscovite (*) | Mica Clay | KAl2(Si3Al)O10(OH)2 | 1 | 180319 | 17380 | ||
| Opal (*) | Amorphous | SiO2·nH2O | 1 | 180319 | 2994 | ||
| Orpiment (*) | Orpiment | As2S3 | 1 | 180319 | 511 | ||
| Pyrolusite (*) | Rutile | MnO2 | 1 | 180314 | 3106 | ||
| Realgar (*) | None | AsS | 2 | 180318,180319 | 712 | ||
| Siderite (*) | Calcite | Fe(CO3) | 1 | 180319 | 6417 |
| Sample | Source Locality | Reference URL |
|---|---|---|
| R060466 | Skaggs Springs, Warm Springs Dam, Coast Range, Sonoma Co., California, USA | https://rruff.info/R060466 |
All locality data graciously provided by mindat.org
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