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Calaverite is a bronze-yellow massive mineral with metallic lustre; a telluride of gold. It was first found in Calaveras County, California.
 Research Calaverite
Sylvanite is a rare ore of gold, silver, and tellurium of a steel grey, silver white, or brass yellow colour, formed in low temperature hydrothermal veins. It often occurs in implanted crystals resembling written characters, and hence is called graphic tellurium. It is associated with calaverite and other tellurides - usually in quartz gangue. It has a relative hardness of 2.
Research Sylvanite
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The Probert Encyclopaedia was designed, edited and programed by
Matt and Leela Probert
©1993 - 2009 The Probert Encyclopaedia
Southampton, United Kingdom
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