Pyrite (rare diploid xls) Will Henderson Coll.

Item Description

The sharp, lustrous, brassy, pyrite crystals on this fine thumbnail exhibit the rare diploid crystal form (having 24 or more crystal faces). The Duff Quarry is world famous for the variety of complex pyrite crystal forms and this is an excellent and rich example. Ex Will Henderson Collection, a well-known, longtime mineral author and collector. He was formerly a columnist for the Mineralogical Record.