| Title | Calcite crystals grown on siltstone |
| Description | This specimen, about 10 cm across, shows fine calcite crystals that grew as a coating on a siltstone. |
| Photographer | Twyla Baker. 2001-06-11. |
| Collection | University of North Dakota Mineralogy Collection #4001. |
| Key words | calcite, siltstone |
| Tech details | 910 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 679 |
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