Stokesite with Microlite on Albite

Item Description

A very rare specimen of the caclium tin silicate, Stokesite from the famous Urucum Mine in Brazi. This locality is known for producing the finest crystals / specimens of Stokesite extant. This piece features a radial groups of tan colored Stokesite measuring 1.2 cm across sitting on bladed Albite matrix forming an attractive overall specimen. Associated orange-brown colored Microlite and purplish "Lepidolite" can be seen on the piece as well. It's hard to find matrix specimens of Stokesite, as most specimens are single "balls" off matrix. This species has been known since 1899, but samples are nearly impossible to obtain from any locality. Sometimes you can find them from Brazilian dealers, but that's about it. Interestingly enough, this species is actually named after a mathematician, who is the namesake for Stokes's law, describing the force acting on a particle moving in a fluid medium.