WurtziteWurtzite is the hexagonal dimorph of the better known zinc sulfide, Sphalerite. The species was named after Charles Adolphe Wurtz, a Frenchman who was one of the most influential chemists in the world. He received many honors in his lifetime, and he is one of 72 scientists, mathematicians, and engineers whose name is on the Eiffel Tower. Typically, Wurtzite is found in either opaque or nearly microscopic crystals, so faceting gemstones is nearly

This is a classic example of what a "Spinel"-twinned Copper should look like

that this piece is truly one-of-a-kind

and not all minerals (including Opal) fluoresce under different UV waves

Carl Kolzer collection

crystallized examples but large display specimens to boot

makes this one of the more unique smaller Bournonites I have handled from this mine

No damage to the Brookites and it's not very often that one finds such superb eye-catching examples of the species like this in near full-size cabinet display specimens

especially when they're so well isolated and distinct

a few miners were able to liberate some of these beautiful Creedite specimens

The finger is complete all the way around and has a very slight coating of a secondary clay mineral

They are sometimes called epimorphs or perimorphs depending upon who you ask

Specimen # BOL711B248