Tourmaline, Black Tourmaline,
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Tourmaline products include:Tourmaline, Black Tourmaline, tourmaline jewelry, pink tourmaline, green tourmaline, Fibrous-tourmaline, Crystal-tourmaline, tourmaline hair products, tourmaline dryer, tourmaline beads.
The Tourmaline Group has a general formula of AX3Y6(BO3)3 Si6O18(O, OH, F)4. The A can be either calcium or sodium. The X can be either aluminum, iron, lithium or magnesium. The Y is usually al