Proustite in gypsum

Item Description

From a small pocket collected in 2004, this is an unusual specimen in several regards. Firstly, it is just a very rich proustite for a Mexican locale (though other silver minerals are common enough for Mexico, proustite surely is NOT~). Secondly, it is the only one I have personally seen on selenite, both including it and growing upon a smothered selenite crystal or mass! All in all, a most unusual specimen, that happens also to be red and sparkly, and quite gemmy, when backlit. this is a unique piece in my experience