TOURMALINE COLOR CHANGE CUSHION 2.93 CTS NATURAL SRI LANKA GEM

100% Natural – Not treated in any way.
Rare Collectors Gem.
Will make a Gorgeous Ring or Pendent accented with Diamonds.
Color enhances to incandescent light.
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.C: (NaCa)(LI,MgFe,Al)9B3Si6(O,OH)31
Density: 3.06 (.05, +.15)
Crystal Group: Hexagonal

The name Tourmaline comes from the Singhalese(Sri Lankan) words‘tura mali’ Gem with several colors some have two or more colors, some even color-changing, and also a rare variety- the Cats-eye. Sri Lanka produces a beautiful multi-colored tourmaline – a mix of red yellow and green which are more like color-changing. Multicolored gems are truly a gemological wonder, as they have a unique beauty of their own displaying different colors at different angles due to pleochroism.