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Pyrostilpnite, ex Columbia Univ. & Feinglos Coll.
- St Andreasberg, Harz, Lower Saxony, Germany
- Thumbnail, 2.2 x 1.2 x 0.3 cm
- Start Time: 01/03/2013 6:30:00 pm (CST)
- End Time: 01/10/2013 6:46:16 pm (CST)
- Auction Closed
Item Description
Pyrostilpnite is the rare monoclinic dimorph of pyrargyrite, a trigonal mineral. It is VERY VERY rare and only seen in this quality on specimens generally over 100 years old from Chile and Germany. A LARGE and aesthetic arborescent cluster of wine-red, lamellar crystals is aesthetically set on the sulfide and quartz thumbnail matrix. Crystals over 1mm, eye visible, are very hard to obtain, so this is a super-rich piece with a 7 mm spray! Rare in quality and uncommon, probably old-time ore material from the famous mines at St. Andreasberg. Ex Columbia Univesity and Mark Feinglos Collections. Valued $1000-1500.