Home > Copper Minerals II – September 8 > MS1129 Chalcosiderite


Chalcosiderite is a copper iron phodphate, named after its composition (Ullman, 1814). The mineral is triclinic, and has an isostructural relationship with turquoise. This is a fragment of quartz, iron stained, covered one both sides with dark green crystals, with some minor iron staining. Chalcosiderite has formed radiating aggregates on this specimen, 2-3 mm in diameter. Many crystals are worn or chipped, suggesting years of drawer wear for the specimen.

This specimen was part of the personal collection of Ralph Merrill, proprietor of the prolific mail order business Minerals Unlimited. There is an aged script label from Krantz accompanying this specimen. Merrill's collection card and label also ship with the specimen.

Price: $60

Item code: MS1129

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