Pyrite (iron cross twins) (5 piece set) (ex Kay Robertson Collection)

Item Description

A 5-piece set of the hard to find iron cross penetration twins of Pyrite from Vlotho. I've only seen a few of these over the years, and they are highly sought after by collectors. The pieces in this set are very sharp, metallic, bronze colored twinned Pyrite crystals. The Pyrites not only shows excellent textbook twinning, but have a gorgeous patina giving it a wonderful antique appearance. If you collect sulfides or German minerals, you can't afford to pass up on this set as they are seldom seen on the market. Ex Kay Robertson Collection (#5933). 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).