a friend of mine recently acquired a fluorescent specimen labeled simply Mineral Y from Crestmore Quarry, California. The fluorescence is purple (sw) Appears as a whitish coating on rock. Anyone have any idea what this stuff is?
I just won a piece on eBay - from the description:
Mineral Y refers to tentative names given to unidentified Crestmore
minerals by Josoeu Munooctt in his 1961 article in the "American
Mineralologist". He describes mineral Y as a "copper bearing
calcium silicate hydrate". I have not been able to find a newer name
for this mineral. It has a very distinctive fluorescence among Crestmore
Minerals so should be fairly easy to identify if you can find newer
I don't have a copy of that article, but I hope this helps!