Cassiterite pseudomorph after Orthoclase (classic material) (ex Kay Robertson Collection)

Wheal Coates, St Agnes, St Agnes District, Cornwall, England, UK
Miniature, 3.8 x 2.1 x 1.0 cm
Start Time: 09/14/2017 6:45:00 pm (CDT)
End Time: 09/21/2017 6:30:00 pm (CDT)
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Item Description

A classic piece of the well-known, eye-catching pseudomorphs of grey-black, fine-grained Cassiterite which has formed a pseudomorph after tabular Carlsbad-twinned Orthoclase. These are hard to find, and if you collect European minerals, don't miss out on this one! I don't know if this particular replacement of Cassiterite after Orthoclase is found anywhere else on earth. Ex Kay Robertson Collection (#4969). Kay is a prominent California collector, who specialized in European classics (see the article in the March-April, 2007 Mineralogical Record).

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