Stokesite (rare) (ex Kay Robertson Collection)

Item Description

A very rare specimen of the caclium tin silicate, Stokesite from the famous Brazi. Brazil is known for producing the finest crystals / specimens of Stokesite extant, though they are rarely found in such attractive groups like this! This piece features four disticnt radial groups of beiege colored Stokesite, forming an attractive overall specimen. I likened it to the form of a "four-leaf clover". It's a complete floater all around and looks beautiful from all sides. 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. Ex Kay Robertson Collection (#1099). Kay is a prominent California collector, who specialized in European classics (see the article in the March-April, 2007 Mineralogical Record and the 50+ page article in the German Magazine "Mineralien Welt" November-December 2017).