A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Chlorargyrite (cerargyrite) |
|---|---|
| Description | The brownish material is chlorargyrite (AgCl), also sometimes called cerargyrite or horn silver. It forms isolated and fleetingly small but rich deposits of silver ore. The chlorargyrite forms on top of silver ore veins that have been subjected to weathering. Chlorargyrite is often white, yellow or light brown when fresh, but it darkens as it tarnishes when exposed to air and light. It forms in weathering zones of silver-sulfide deposits. This sample contains several other secondary minerals but they are too fine grained and altered to identify. This specimen is about 5 cm across. Chlorargyrite's chemical formula is AgCl. It is named after its chemical composition of chlorine (Greek, chloros meaning “pale green”) and silver (Latin, argentum). |
| Location | USA ▹ Utah ▹ Beaver. Near Frisco. Horn Silver Mine, San Francisco Range. |
| Photographer | Shannon Heinle. 2001-03-07. |
| Collection | University of North Dakota Mineralogy Collection #316. |
| Key words | horn silver, chlorargyrite, cerargyrite, utah |
| Tech details | 396 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 189 |
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