This stone consists of more color variants than any other gemstone in the world. Usually rich in iron these stones run from black to bluish-black to deep brown. Depending on the trace elements colors can be blue, green, red, yellow, and pink. Crystals can be bi-colored or multicolored and some stones change color when viewed from different angles. Tourmaline from Sri Lanka was first introduced to Europe by the Dutch East India Company. Today tourmaline is mined in Brazil, Africa, Tanzania, Kenya, Afghanistan, Pakistan and the United States.
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