CHRYSOBERYL 4 RAY STAR 8.73 CARATS OVAL SHAPE 20361 NATURAL SRI LANKA LOOSE GEM

100% Natural – Not treated in any way.
Rare Colectors Gem.
Suitable for Museums,Institutions
and Students of Gemology.
Beautiful sharp Star effect.
Among the Rarest of gemstones.

Refractive Index: 1.741 - 1.760
Hardness: 8.5
Chemical Comp: BeAl2O4
Density: 3.73
Crystal Group: Orthorhombic

Rarely some gems display a 4 Rayed
Star which are extremely rare – a
collector’s gem. Fine inclusions in the
stone are responsible for this
phenomenon called chatoyancy.
The incident light is reflected in such a way
that a bright strip of light appears
running perpendicular to the inclusions.