TOURMALINE YELLOW GREEN 4.57 CTS – NATURAL CEYLON LOOSE GEM – 18705

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.
Gem with High Luster and Good Clarity.
A Gem of Lasting Beauty.

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.