Mn-Calcite on Quartz (ex Brian Kosnar Collection)

Item Description

Here we have one of the few Calcite and Quartz specimens that I have offered from the famous Portland Mine in the San Juan Mountains of southwestern Colorado. The pieces features sharp, translucent, colorless, doubly-terminated Quartz crystals which have formed in a "fan"-esque growth. The specimen is nearly a fully crystallized "floater" despite one point of contact on the bottom. Lastly, the Quartz crystals are dusted with pale pink Mn-Calcite and minor sulfides for an added touch. A classic specimen from this relatively obscure mine near Ouray, which was best known to collectors for the amazing green Sphalerites it produced. If you're a Colorado collector, a Quartz collector or a collector of both, don't let this one get away.