A well-known gemstone that comes in a variety of vivid colors is tourmaline. The history of semi-precious gemstone is extensive. It is a crystalline boron silicate mineral with a vitreous gloss. Tourmaline is a member of the hexagonal crystal structure and has an opaque transparency. The stone's price reflects its brilliant color and gleaming luster. It is available in a variety of hues, including black, watermelon, rainbow, pink, green, and purple.
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