A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Chalcopyrite on dolomite, from Joplin, Missouri |
|---|---|
| Description | Most of this sample is pinkish “pearly” dolomite, CaMg(CO3)2 (calcium magnesium carbonate). The dolomite crystals are basically rhombohedral in shape, but most of the crystals are intergrown or have been modified in some way and so do not appear as perfect rhombs. The dark material speckled on top of the dolomite is chalcopyrite, CuFeS2 (copper iron sulfide). Chalcopyrite often has a bright metallic brassy yellow color, but tarnishes to become darker as is seen here. This specimen is 14 cm across. |
| Location | USA ▹ Missouri ▹ Jasper. Near Joplin. |
| Photographer | Darla Sondrol. 2001-06-19. |
| Collection | University of North Dakota Mineralogy Collection #670. |
| Key words | Chalcopyrite, Dolomite, Missouri |
| Tech details | 695 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 790 |
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