SILIMANITE CATS EYE 2.87 Cts OVAL SHAPE NATURAL CEYLON LOOSE GEMSTONE 20577

100% Natural – Not treated in any way.
Rare Collectors Gem
Suitable for Museums,Institutions and Students of Gemology.
Will make a Gorgeous Ring or Pendent accented with Diamonds.
Beautiful sharp Catseye effect.
Large Sizes are Extremely Rare!
Chatoyancy is Cats Eye gems is best seen in Bright Sunlight or by focusing a flashlight on the face of the gem
Among the Rarest of gemstones.

Hardness: 6 – 7.5
Chemical Comp: Al2OSiO4
Density: 3.25
Crystal Group: Orthorhombic

Sillimanite Cats-eyes also called Fibrolite, comes in a range of colors from brown yellow to green, or colorless, and cuts beautiful Cats-eyes. Some chatoyant gems display a razor-sharp silver ray and are most attractive. The finer qualities are rare and much sought after by collectors and connoisseurs alike.