A bright, beautiful piece with two prominent, cuboctahedral fluorite crystals resting on a bed of lustrous, jet-black sphalerite and nicely accented with brassy chalcopyrite crystals. The crystals are just stunning in their clarity, color, and gemminess. The cubocts are bi-colored, a rich pastel-green and a washed-out gray. Most of the lustrous faces on this beauty are lightly frosted, which makes the crystals translucent. BUT, a couple of side faces are gem-clear, which give a television-like view in to the crystal interior. A really neat effect. Very fine Naica material from the recent find. These are contemporary classics.