| AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Iowa > Calcite |
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| DESCRIPTION: | No. 11092 |
| Mineral: | Calcite |
| Locality: | Oskaloosa area coal mines, Mahaska County, Iowa |
| Description: | Classic specimen of two generations of calcite on matrix. The first generation is iridescent brown rhombic crystals to 6 mm on edge, with later growth white scalenohedral crystals to 10 mm, including some doubly-terminated. |
| Overall Size: | 12x8x7 cm |
| Crystals: | 3-12 mm |
| Archived: | For reference only |
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