Aesthetic presentation of Sphalerite crystals among Quartzes from 9th Septemvri mine, Madan ore field, Bulgaria. The Sphalerite crystals are black truncated tetrahedrons with strong luster. They are sharp and shiny with good geometry. The faces have nice striations. The Quartz crystals are chunky and opaque. In very good condition – some small nicks.

Wonderful!