Tennantite on Quartz (ex Kay Robertson Collection)

Item Description

One almost never sees these specimens on the market anymore, but they simply are some of the best quality crystallized Tennantites from the western hemisphere. This is a very good quality and showy small cabinet specimen featuring a 1.4 cm, sharp, well-formed, modified (trapzeohedron / dodecahedron) crystal of Tennantite with smaller Tennantite crystals on white Quartz matrix. Worth picking up from this noted copper producer in central Mexico. It's nearly crystallized all the way around as well. Valued at $1200. Ex Kay Robertson Collection (#6602). 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).