Malachite pseudomorph after Azurite (classic material) (ex Kay Robertson Collection)

Item Description

These were probably some of the first known pseudomorphs of Malachite after Azurite, though at the time they were first discovered. Azurite may not have been known as a species, so these were simply Malachite specimens. The historic copper producing region around Rudabanya dates back to medieval times, and has produced some fantastic mineral specimens. This thumbnail is a fantastic display specimen of this old classic material featuring sharp, notably lustrous, rich green colored crystals of Malachite which have replaced the preexisting Azurite. A great specimen of this now very hard to find material. Ex Kay Robertson Collection (#12983) mounted in an old Willard "Perky" Perkin box. Kay is a prominent California collector, who specialized in European classics (see the article in the March-April, 2007 Mineralogical Record and the 50+ page article in the German Magazine "Mineralien Welt" November-December 2017).