Halides: cerargyrite (hlorargirit)
Diagnostic Card.
Ag Cl (silver chloride)
Crystal system cubic
Hardness of 1.5-2
The proportion of 5.5-5.6
fracture flake
Colour white when mineral clean and fresh
Color white powder
diamond Gloss
Cerargyrite presented cubic crystals, the complicated facets of the octahedron and rhombic dodecahedron; much less common other forms. The most frequently represented cerargyrite crusts or horny masses. He is a very flexible, almost like wax. In the fresh state, and without impurities is colorless mineral.
Diagnostic features.
To confidently identify cerargyrite, check its characteristic plasticity (cut with a knife) as insolubility in acids.
Extremely sensitive to light, becoming gray to purple to black.
Origin.
Cerargyrite found mainly in the surface horizons of silver deposits.
Deposits and application.
The mineral has a high (75%) the silver content. It is found in classical serebronosnyh regions - in the Ore Mountains, the Harz Mountains and Alsace. There is also in Kazakhstan, Uzbekistan and Siberia. Distributed in the US famous fields such as Leadville (Colorado), Lake Valley (New Mexico), Tombstone (Arizona). In Italy it is very rare.
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