| Title | Calcite crystals on ferruginous nodule |
| Description | These calcite crystals are in clumps up to 1 cm across. They have grown on a dense hematitic nodule of unknown origin. |
| Location | USA ▹ North Dakota ▹ Sioux County. Near Fort Yates. |
| Photographer | Nessa Eull. 2001-06-12. |
| Collection | University of North Dakota Mineralogy Collection #644. |
| Key words | hematite, calcite, North Dakota |
| Tech details | 501 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 707 |
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