Benitoite from the Dallas Gem Mine in San Benito County, California, the type locality. Pictur
Benitoite from the Dallas Gem Mine in San Benito County, California, the type locality. Pictured under short wave ultraviolet light and white light. Benitoite was discovered in 1907 and is the State Gemstone of California. It crystalizes in the rare ditrigonal-dipyramidal crystal structure. You can see this cool rock at a different angle here: https://arockmaniac.tumblr.com/post/183595828185/benitoite-crystals-with-a-small-crystal-of-black -- source link
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