Green and Yellow Banded Tourmaline 4mm Faceted Coin - 15-16 Inch
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Green Tourmaline ranges in color from pale green to dark emerald to shades of olive and moss green. It is an aluminum borosilicate mixed with iron, magnesium and other metals that give it its color. Tourmaline occurs in nearly every color in the rainbow and its name derives from “turmali,” the Sinhalese word for “mixed color precious stone.” Tourmaline began to be highly prized after George Kunz, a mineralogist and jeweler, sold a piece of Green Tourmaline to Tiffany & Co. in 1876. Tourmaline is unusual in that it is both pyroelectric and piezoelectric, meaning it becomes magnetically charged from heat or friction.