Dims: 1.6" x 1.4" x 1.0"(6.1 x 3.6 x 2.5 cm)
Wt: 23.0 g
Sarbayskaya open pit Quarry, near Rudniy, Kustenay Oblast, Kazakhstan
This thumbnail specimen consists of a single, round Stellerite cluster on a zeolite bed. The cluster measures 0.9" (2.3 cm) and is in the shape of a sphere that is about 60% complete. It is in very good condition, as there is only one very small spot of damage visible. The crystals that make up the cluster are packed so tightly that I cannot discern one from another. They have a bright orange coloration and a pearly-to-vitreous luster, and are almost transparent. The bed on which this cluster rests appears to be composed of 3 different zeolite minerals. There is the inevitable stilbite, which often accompanys all zeolites, and some rather broken chabazite rhombohedrons. There are also some slightly curved trigonal crystals of colorless gmelinite, an uncommon zeolite. These crystals do not exceed 0.3" (8 mm) in diameter and are transparent and quite clear, with a bright, vitreous luster. Though not the prevailing mineral on the specimen, I think that the gmelinite is its most interesting aspect.