Colemanite, California - 01



Colemanite, Boron Pit, Boron, CA. Numerous bladed colemanite crystals to 20 mm on massive white colemanite matrix. Back in the late 80s, when U.S. Borax still owned the Boron Pit, collecting on their dumps was allowed on weekends, and this type of colemanite specimen was a common find. Times have definitely changed. (US penny coin is 20 mm in diameter).