Chrysocolla

Written by Boss Tambang Wednesday, 02 December 2009 00:06

Gallery - Mineral Gallery

Where you see this bright blue-green mineral, you’ll know that copper is nearby. Chrysocolla is a hydroxylated copper silicate mineral that forms in the alteration zone around the edges of copper ore bodies. It almost always occurs in the amorphous, noncrystalline form shown here. This specimen has an abundance of chrysocolla coating the grains of a breccia. The scan doesn’t really do justice to the color, which is close to turquoise. Real turquoise is much harder (Mohs hardness 6) than chrysocolla (hardness 2 to 4), but sometimes the softer mineral is passed off as turquoise.

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