large Colemanite (Type Locality area) Chet Lemanski Coll.

Item Description

Three LARGE for the locale, sharp Colemanite crystals are aesthetically intergrown on this impressive large specimen from the Thompson Mine. The three glassy, translucent crystals appear to have two different crystal forms. The large 8.8 cm across at the base crystal on the left with the interesting stepped-growth faces appears to be a pseudo-octahedron. The inverted crystal in the middle with the hoppered face and small secondary Colemanites appears to be a pseudo-rhombohedron. The very sharp 7.7 cm crystal on the right is also a pseudo-rhombohedron. This well-known borate mine was discovered in 1915 and closed in 1977. It produced some of the finest California Colemanites. The Furnace Creek District is the Type Locality for Colemanite. Ex Chet Lemanski Collection and acquired in 1984. This is an outstanding large Colemanite from this locale with very large crystals.