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Tourmaline

 Tourmaline

Tourmaline (pronounced a "tur-mah-Leen") is a semi-precious gemstone which is a crystal boron silicate mineral compounded with elements such as aluminium, iron, magnesium, sodium, lithium, or potassium.  It occurs in a rainbow of colors, somtimes even within the same gemstone. Black tourmaline also exists and is sometimes used by those who believe in the healing properties of certain gemstones.

While not always necessary, some tourmaline gems, particularly those pink to red colored stones, are heat treated to improve their color. The use of Irradiation  treatments is almost impossible to detect in tourmalines, but insn't harmful to their value.  Treated clarity-enhanced tourmaline (especially paraiba) is worth a lot less than a non-treated gemstones.


 Tourmaline Crystals
Touramaline Crystals of Different Colors

Black Tourmaline Crystals in Rock
Black Touramaline Crystals

Tourmaline Cut Gemstones
Cut Touramaline Gemstones



STATS:
Color:  Colorless, pink, red, brown, yellow, green, blue, violet, black, multi-colored
Mohs' Hardness Scale: 7 to 7.5
Density:  2.82 to 3.32
Transparency:  Transparent to opaque



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