Mineral "Chrysocolla"

sold

Bisbee, Arizona, USA, private collection from Netherlands.

Chrysocolla is a hydrated copper phyllosilicate mineral and mineraloid. The name comes from the ancient Greek χρυσός (chrysos) and κολλα (kolla), "gold" and "glue," in allusion to the name of the material used to solder gold and was first used by Theophrastus in 315 BC. This mineral is amorphous meaning that it does not have a coherent crystalline structure. Chrysocolla has a cyan (blue-green) color and is a minor ore of copper, having a hardness of 2.5 to 7.0. It is of secondary origin and forms in the oxidation zones of copper ore bodies. Associated minerals are quartz, limonite, azurite, malachite, cuprite, and other secondary copper minerals. It is typically found as botryoidal or rounded masses and crusts, or vein fillings. The condition of the sample is good. Chrysocolla with vivid cyan blue color. Age-related wear, fractures and minor cracks may appear. Dirt and dust may exist. Size approx. 6,9cm x 5,1cm x 2,5cm. Weight c. 44g.