Smoky quartz and black tourmaline cluster with hyalite Dolomite There is understandably some confusion

There is understandably some confusion distinguishing what is calcite

but turns visibly greenish yellow when exposed to the UV in sunlight

shown in the detail images

This unusual combo features yellow cubic fluorite with bladed barite that ranges in color from light peachy pink to a deep red-orange

Approx weight: 141g

Smoky quartz and black tourmaline cluster with hyalite Dolomite There is understandably some confusionLocale: Erongo Mountain, Namibia Approx dimensions: 3. 5 x 2. 5 x 2. 5" Approx weight: 320g This Erongo specimen features a cluster of black tourmaline (schorl) between two chunky smoky quartz crystals, with a heavy coating of hyalite on the base and wrapping the larger quartz crystal. The glossy schorl crystals grow in short prisms with the classic trigonal 'Mercedes' termination characteristic of Erongo material. Erongo smoky quartz typically grows