Product details
100% Natural – Not treated in any way.
Suitable for Museums,Institutions and Students of Gemology.
Gem with High Lustre and Good Clarity.
A Gem of Lasting Beauty.
Tourmaline Color-change – A unique color miracle displaying a Mix of Red, Yellow, Gold and Green – Rare type of Tourmaline
R I:1.624(+.005,-.005)-1.644(+.006,-.006)
Hardness: 7-7.5
C Cp: (NaCa) (LI,MgFe,Al)9B3Si6(O,OH)31
Density: 3.06 (.05, +.15)
Crystal Group: Hexagonal
Tourmaline occurs in all colors, but red, green, and multicolored are the most popular gems. The name Tourmaline comes from the Singhalese (Sri Lankan) words ‘tura mali’ –Gem with in a multitude of colors, some have two or more colors, some even color-changing, and also a rare variety- the Cats-eye.
Tourmalines will often display several colors and its main feature is its marked dichroism. Green Tourmaline is very popular.
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