| 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. |
| Baddeleyite | Corundum | None | Not in a structural group |
| Baddeleyite (*) | Corundum (*) | Sillimanite (*) |
| 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 |
|---|---|---|---|---|---|---|---|
| Baddeleyite (*) | Baddeleyite | ZrO2 | 0 | 238 | |||
| Corundum (*) | Corundum | Al2O3 | 0 | 1797 | |||
| Sillimanite (*) | Not in a structural group | Al2SiO5 | 0 | 1516 |
| Sample | Source Locality | Reference URL |
|---|---|---|
| FKM-78 | Bozeman Corundum Co. Mine, Gallatin Gateway, Gallatin Co., Montana, USA | https://www.rockptx.com/fkm-76-to-fkm-100/#FKM-78 |
All locality data graciously provided by mindat.org
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