Locality: Boraxo Mine (Kern Borate; Boraxo Deposit; Boraxo No. 1 and No. 2; Clara Claim; Thompson Mine; Tenneco Mine), Inyo County, California, USA (Locality at mindat.org)
Size: 8.0 x 6.4 x 6.4 cm.
Large, lustrous and translucent, well-formed, light amber colemanite crystals up to 5.3 cm across from an extinct California locality, the Thompson Mine in Death Valley. Some of the faces have showy, very pronounced stepped growth. All of the display faces are pristine. Ex. Mullane Collection.
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