Aurichalcite (ex Kay Robertson Collection)

Item Description

Aurichalcite from the famous 79 Mine generally sets the standard, at least when you see the species in old books and magazines. This specimen is a nice display piece featuring brilliant turquoise blue colored "needles" and "tuft"-like groups of Aurichalcite with minor silvery-white Hemimorphite on matrix. I love the intensity of the color in the Aurichalcite. A beautiful example of this well-known and now hard to find material from this fantastic locality that lasted from 1879 to 1992. Ex Kay Robertson Collection (#6616). Kay was a prominent California collector, who specialized in European classics. She nearly lived 100 years from April 1920 - March 2020. See the article in the March-April, 2007 Mineralogical Record and the 50+ page article in the German Magazine "Mineralien Welt" November-December 2017.