-40%
Tourmaline Multicolored Stretch Chip Bracelet
$ 3.43
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Description
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(BO3)3 (OH,O)3 (OH,F,O)
Boron Silicat
From "Gemstones of the World" by: Walter Schumann:
Tourmaline is crystalline (Ca,Na,K,[vacancy]) (Li,Mg,Fe+2,Fe+3,Mn+2,Al,Cr+3,V+3)3 (Mg,Al,Fe+3,V+3,Cr+3)6 ((Si,Al,B)6O18) (BO3)3 (OH,O)3 (OH,F,O) Boron Silicate.
"Even though tourmaline has been known since antiquity in the Mediterranean, region, the Dutch imported it only in 1703 from Sri Lanka to Western and Central Europe. They gave the new gems a Sinhalese name, Turamali, which is thought to mean “stone with mixed colors."