Pharmacosiderite

$300.00

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A flat miniature plate of Quartz veinstone, about one third covered in dark leaf green Pharmacosiderite from Wheal Gorland in the parish of Gwennap, Cornwall. The Pharmacosiderite forms cubic crystals of about 1 mm on edge with a bright lustre and lining a long shallow vug. The dark grey matrix surrounding the Pharmacosiderite has occasional iridescent patches, indicating the presence of metallic oxides or sulphides. A good representative specimen from this most famous Cornish mine.