Dims: 1.6 x 1.5 x 0.8" (4.1 x 3.8 x 2.0 cm)
Wt: 13.2 g
Gem Mine, San Benito County, California, U.S.A.
Three Benitoite crystals rest on the pale gray host rock of this thumbnail specimen. Each of these crystals is considerably damaged, and none are complete. They do not exceed 0.3" (8 mm) along an edge and where intact, show good hexagonal prismatic form, with sharp edges and clean faces. All have a coloration that ranges from white to deep blue to blue-gray and a luster that ranges from vitreous to pearly. Two of the crystals are translucent and show patches of transparence, but the other is essentially opaque. All glow a bright blue under shortwave ultraviolet light (see the second image). Only a small amount of white, massive natrolite accompanies them.