Topaz crystal, 4.8 cm, from the Hoffman Ranch, Grit area, Mason County, Texas. Ex collections of Breck P. Kent, Frank Knechtel, and Leo Horensky. Joe Budd photo.
hard, glassy orthorhombic crystals from pegmatites and rhyolites; colors range from colorless to pink; sharp terminations aid identification, localitie…
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