Mineral: Corundum
Locality: Bozeman Corundum Co. Mine, Gallatin Gateway, Gallatin County, Montana, USA
Dimensions: 6.0 x 7.8 cm

Description: Six blue-gray doubly terminated corundum crystals in a feldspar/biotite matrix. This piece came from the collection of John Sinkankas. On his catalog card he notes that he acquired it from the Devereaux Collection in 1968.

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