Bournonite on Pyrite (excellent “cogwheel”)A very good quality, COMPLETE, sharp, lustrous, silvery colored classic cogwheel twinned crystal group is aesthetically flaring off lustrous, golden, octahedral metallic Pyrite matrix. The cogwheel is essentially undamaged, save the tiniest of Wilbers on the edge. Its amazing to me that you can see all sides of the cogwheel as its not buried into the Pyrite matrix, which is EXCEPTIONALLY RARE in my experience with the material. If youre a Bolivian

the Ferberites from Tasna are not found on matrix as they are heavy in nature and the brittleness of the species causes it to fall off the host rock in the blast during mining operations

which sometimes played host to beautiful jet-black Ferberite crystals

The fact that the Stilbites are sitting atop Rhodochrosite makes it even more enticing

Crystals of this size from Viloco are almost impossible to find

colorless Quartz crystals

jet-black to deep maple amber colored cyclic twinned crystal group with minor Quartz and matrix on the underside

If that wasn’t enough

An attractive Ludlamite specimen from the famous mine at Haununi

This piece features an alluring

Willard (1904-1998) of Colorado Springs

in the hopes that there would be more

in ANY format