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Phosgenite is a rare lead secondary mineral, formed when Galena oxidizes in the presence of chlorine ions. It was first described on the basis of crystals from Derbyshire in England, far from where one would expect a source of chlorine. Subequently, much larger crystals have been found in Sardinia and occasionally in Morocco. This heavy cabinet-sized display specimen is from the latter, from the Touissit-Bou Beker District, and is world-class. A part oxidized Galena matrix has one side formed into a cavity lined with extremely reflective, colourless, glassy, blocky Phosgenite crystals displaying wonderfully well-defined crystal faces. Ex Nick Hawes collection, this specimen has previously been owned by Walter and Margaret Rieger in Germany and Trevor Bridges in England and probably dates back to at least the 1990s. Due to its weight, at nearly 1kg, this specimen will incur additional postage charges.
80 x 98 x 58 mm