Stannomicrolite on Stokesite

Item Description

An EXCELLENT thumbnail of RARITIES from the famous Corrego do Urucum Pegmatite of Brazil. A RICH dusting of yellowish-brown stannomicrolite microcrystals coats glassy stokesite crystals. Stannomicrolite (a hydroxide) is the tin-rich member of the microlite subgroup of the pyrochlore group of minerals and is known from only THREE localities worldwide. Stokesite is an ULTRA RARE calcium, tin silicate. A RARELY available combination specimen of these ultra rare species. Older material.