Brookite on Quartz (ex Kay Robertson Collection)

Magnet Cove, Hot Springs County, Arkansas, USA
Thumbnail, 2.8 x 2.7 x 1.8 cm
Start Time: 01/20/2022 9:00:00 pm (CST)
End Time: 01/27/2022 6:45:00 pm (CST)
Auction Closed
Winning Bidder: Private Bidder

Item Description

A classic old specimen of the famous crystals of Brookite from Magnet Cove. Several sharp, well-formed, pseudo-octahedral (orthorhombic) crystals of Brookite measuring up to 7 mm sit aesthetically on prismatic grey colored Quartz crystal matrix. Interestingly, there is a distinct purple iridescence that can be seen when the Brookite is rotated in the light, although I have no idea what could be causing it. Ex Kay Robertson Collection (#9821). 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.