Quartz with Stibnite inclusions (ex Kay Robertson Collection)

Item Description

A rarely seen example of Quartz hosting thin prismatic inclusions of Stibnite from Butte County, California. Upon close inspection, it looks like some of the acicular Stibnite crystals have partially altered to yellow Stibiconite (?) or maybe there's a slight amount of Cervantite coating them, it's hard to say for certain. The Quartz crystals are notably gemmy, sharp and lustrous, but the piece is not damage-free, so it's mostly an esoteric reference piece more than anything, but how often does one find Stibnite included in Quartz like this? Ex Kay Robertson Collection (#K8-393). 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 ( https://www.mineralogicalrecord.com/pdfs/Kay%20Robertson%20Collection.pdf ), and the 50+ page article in the German Magazine "Mineralien Welt" November-December 2017.