Tetrahedrite ex Frank Keutsch coll

Item Description

This piece features numerous, sharp, metallic steel-gray crystals of Tetrahedrite measuring up to 2.7 cm on edge. The crystals are textbook for the species and mineral name says it all for their shape! The crystals on this plate are distinct with pronounced edges, faces and points with some subtle geometric growth patterns on their faces. Very minor damage amidst all the intact crystals. The periphery and bottom of the piece are accented by massive, brassy yellow Pyrite for great contrast! It's an excellent piece with only very minor contacting to a couple of the crystals. From the collection of FDr. Frank Keutsch of Harvard, a specialist in such sulfides.