TOURMALINE

Tourmaline: A group of minerals composed of complex cyclosilicates containing boron with the general formula NaR3 2+Al6B3Si6O27(H,F)4, where R = Fe2+, Mg, or (Al + Li). The crystals are trigonal, elongated, and variably coloured, the two ends of the crystals often having different colours.

tourmaline is used to increase product viscosity, this is a semiprecious stone. There is little clinical evidence supporting therapeutic claims associated with tourmaline.Tourmaline, which is a borosilicate, is the main source of boron found in soil. It is a mixture of silicates and borates from where boron is extracted. It is available as a complex cyclosilicate, Al
6
Y
3
Na[Si
6
O
18
](BO
3
)
3
(OHF)
4
, with Y = Mg, Fe, Mn or Li. Th