A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Cyanotrichite with allophane, azurite and hisingerite |
|---|---|
| Description | This sample contains light blue cyanotrichite, dark blue azurite, brown hisingerite, and yellowish allophane. Hisingerite and allophane belong to the same mineral group. Allophane is a hydrated aluminum silicate; hisingerite is a hydrated iron silicate hydroxide. Both are generally poorly crystalline or even amorphous, so their compositions are variable. Cyanotrichite is a hydrated copper-aluminum sulfate hydroxide. Azurite is a copper carbonate hydroxide. These are all secondary minerals, often associated with ore deposits. |
| Location | USA ▹ Idaho ▹ Lemhi County |
| Photographer | Nessa Eull. 2001-06-06. |
| Collection | University of North Dakota Mineralogy Collection #814. |
| Key words | cyanotrichite, allophane, azurite, hisingerite, Idaho |
| Tech details | 831 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 638 |
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