Dims: 1.15x0.98x0.75" (2.92x2.48x1.89cm)
Wt: 0.45oz (12.8g)
San Jose Mine, Oruro, Bolivia
Zinkenite is commonly found as very fine acicular fibers, sometimes coating a surface with a fur-like coating, similarly to jamesonite or millerite. But not this specimen. For this specie, these crystals are large, looking like small crystals of stibnite. But a loupe shows that these crystals have a hexagonal cross section, and terminations that appear basal on one end and jagged on the other. Also, some of the crystals are very thin and very long. All have a dark steel-gray color and metallic luster. The loupe also reveals that there is a fine coating of very tiny zinckenite crystals on the larger crystals on one side of the specimen - they both dull and darken the appearance.