Berthierite (rare) (ex Josef Vajdak)

Item Description

Berthierite is a rare iron antimony sulfosalt and not often found in good crystallized specimens. In 1827 the species was named after Pierre Berthier a chemist from France, and mineralogist at the Ecole des Mines. This piece is from the classic locality at Vlastejovice, featuring micro acicular, silvery-grey thin needles of Berthierite along with massive Berthierite on the host rock matrix. There are literally hundreds of crystals on this piece, though most of them are small and you would need a loupe to see them well. This piece comes with a classic label from Josef Vajdak / Pequa Rare Minerals, which immediately increases the value. You can read Joe's biography here: http://www.minrec.org/labels.asp?colid=1371