Hanksite, Searles Lake, Trona, California

This is a pair of intergrown, barrel-shaped hanksite crystals, from Searles Lake, Trona, San Bernardino Co., California. The hanksite fluoresces a ghostly blue/white under both long and short wave UV light, but shows the brightest response under long wave UV. It is also phosphorescent. Hanksite is an interesting water-soluble mineral that contains both a sulfate and carbonate group, and forms in evaporite deposits in dry lake beds. This specimen measures 40 x 38 x 24 mm.

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