A beautiful example of octahedral fluorite on quartz, form the notable finds at Kara-Oba in the early 1990's. This piece has the sharp, dark purple octahedrons that are typical from the location, though not often seen for sale. It seems I always see pictures of them in other people's collections, but they're never actually available. Between that, and the distinctive yet understatedly attractive appearance of the sharp, opaque crystals, I thought it would be nice to post here.
The quartz on which the fluorites are perched has a contact with a level of visibility that varies with the chosen display angle.