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5 million years ago in Malmian or Jurassic limestone when a meteorite crashed into the earth making a ~10 miles wide crater named the Ries crater in Germany
Color: Fine Pink
Weight: 102 Grams / 3
named Campo del Cielo (Heaven’s Field in Spanish) that was found in 1576 by Spanish explorers
Biotite Mica Book | Black Crystal | 126 Grams | Córdoba, Spain | SO24 Tourmaline 5 million years ago inThis is a beautiful, black Biotite crystal book from Crdoba. Spain. This biotite has a classic crystal shape and attractive dark coloration. Biotite is rarely considered a valuable mineral specimen, but it can accompany other minerals and compliment them. In Bancroft, Ontario Biotite forms large crystals with green apatite and hornblende. Single large plates or "books" of biotite can grow to considerable size and can make impressive mineral specimens.
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