Peretaite

A very rare hydrated calcium antimonide-sulfate hydroxide. It forms transparent, colorless, monoclinic, prismatic, bladed, vitreous crystals, often associated with stibnite and radiating sprays of klebelsbergite and kermesite. Peretaite was approved in 1979, and named for the type locality: Pereta mine, Pereta, Scansano, Grosseto Province, Tuscany, Italy, where it occurs as a secondary mineral in vugs in an antimony-bearing vein in silicified limestone.Other notable localities include: Le Cetine di Cotorniano mine, Chiusdino, Siena Province, Italy; Lavrion district mines, Attiki Prefecture, Greece. You can buy these clear rare crystals online from The Arkenstone, www.iRocks.com to add fine mineral specimens to your collection.