Tincalconite, Hanksite

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A superb combination specimen of rare species from Searles Lake, California and the Jim Minette Collection. A pristine, doubly terminated, sharply hexagonal, translucent hanksite crystal is aesthetically capped by snow-white tincalconite pseudomorphing a very blocky borax crystal. Hanksite is a rare sulfate and tincalconite is a rare borate. Searles Lake is the Type Locality for both species.