Kaolinite ps. Orthoclase, with Cassiterite

Item Description

Truly exceptional, this crystal of Carlsbad-twinned Orthoclase, pseudomorphed by Kaolinite, is perhaps the best one I have ever seen from the clay pit localities in Cornwall. The piece is complete all the way around, with just one tiny cleave in one corner. It has retained its sharp, original crystal form, and the aesthetics are enhanced by the beautiful, egg-shell white color. And if the quality of this large, pseudomorphed twin wasn't enough, there is a sharp, penetration twin emeging from one side. I have seen these penetrations before, but never one this distinct and precise. Great old classic material from Cornwall, this twin upon twin pseudo is exemplary. value d$1000-plus