Dims: 2.9 x 1.7 x 1.7" (7.4 x 4.3 x 4.3 cm)
Wt: 5.8 oz. (163.9 g)
Tongren, Guizhou Province, China
A single prismatic Cinnabar crystal rests on the gray limestone host rock of this small hand specimen. Though it is trigonal in form, it also is in the form of a penetration twin, so that it appears to have a six-rayed, pentagonal cross-section. It has visible dimensions of 0.5 x 0.2 x 0.2" (1.3 x 0.5 x 0.5 cm) and is in pristine condition, showing no human-induced damage whatsoever. Its form is also excellent, as all edges are sharp and all faces are striated but flat and clean, and possess a bright submetallic luster. Its red coloration is so deep that it is nearly opaque to all intents and purposes, and its metallic luster provides some interference. The crystal rests on a bed of heavily intergrown rhombohedral dolomite crystals and is adjacent to a cluster of small, prismatic quartz crystals (see the close-up image).