Dims: 3.0 x 2.7 x 1.4" (7.6 x 6.9 x 3.6 cm)
Wt: 5.4 oz. (154.0 g)
near Ryan, Death Valley, Inyo County, California, U.S.A.
This small hand specimen consists mostly of Colemanite by weight; the Colemanite occurs as a crystalline druse that completely envelops a pale brown host rock. The crystals do not exceed 0.1" (3 mm) in any dimension and are generally in excellent condition, as less than 1% of their number show any damage. Though they are heavily intergrown, all have excellent monoclinic prismatic form, with well-defined edges and occasionally striated but clean faces that possess a bright vitreous luster. All are colorless and transparent, though they have a "dirty" discoloration that is likely caused by inclusions of dirt or silt that were trapped during formation.