Tourmaline and Gemstones
Complex Aluminium Borosilicate
Tourmaline comes in many colors such as blue, yellow, pink, red, black, green and clear. Tourmaline comes in many colors - but primarily in pink and green. It is beautiful in rings, necklaces, and pendants.
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Colors:
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Indicolite (blue or blue-green) -- moderately scarce and expensive in fine qualitities.
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Rubellite (red) -- moderately scarce and expensive in fine qualitities. Often badly included.
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Bicolor or tricolor tourmaline -- shows multiple color zones throughout the crystal. Highly prized when the colors are well divided and vivid. Often badly included and subject to fracture along the color transition line.
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Watermelon tourmaline -- has a red central core surrounded by green, resembling the cross section of a watermelon. Often cut in thin slices to show the colors to best advantage.
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Schorl -- black tourmaline.
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Dravite -- brown tourmaline.
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Chrome tourmaline -- vivid green. Derives its color from chromium. Appears red when viewed through a
Chelsea filter (emerald filter). Fairly scarce and expensive.
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Achroite -- colorless tourmaline. Fairly rare.
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