Dolomite and Quartz on SphaleriteA wonderful display specimen from the famous Black Cloud mine featuring highly vitreous rhombohedra of cream colored Dolomite some of which are oriented into a spherical aggregate at the top of the specimen which are sitting atop beautifully contrasting silvery blue Quartz on black Sphalerite matrix. Some minor associated Galena can be seen on the side of the piece as well. Its such a unique color combination and displays beautifully as you can see

The piece was difficult to photograph

but my favorite aspect of them is the repeating "fan"-like pattern created by the internal black "phantoms"

blocky modified twinned crystals of Bournonite with excellent luster and aesthetics

This is unique material

Specimen # BOL711B127

Good crystallized Rhodochrosites from this locality are among the most distinctive from Colorado and highly sought after by collectors

a form of preserved / fossilized tree resin

If you’re a Bolivian collector

It is a small miracle that the piece was not completely destroyed in the blast when it was found

Specimen # AMAZWH111928

Interestingly

they are newly mined specimens from this well-known locality