Spinel 6 Ray Star Deep Brown 4.71 Cts 18255 - Rare Collectors Gem

Spinel 6 Ray Star Deep Brown 4.71 Cts 18255 - Rare Collectors Gem

  • $240.00

Carats 4.71
Size 10.5 x 8.6 x 5.4 mm
Color Deep Brown
Clarity Opaque
Shape Oval
Treatment None
Origin Sri Lanka
Location Colombo,Sri Lanka
Price $ 240.00
100% Natural - Not treated in any way.
Rare Colectors Gem.
Suitable for Museums,Institutions and Students of Gemology.
Beautiful sharp Star effect.
Large Sizes are Extremely Rare!
Among the Rarest of gemstones.

Refractive Index: 1.718 (-.006, +.044)
Hardness: 8
Chemical Comp: MgAl2O4
Density: 3.60 (-.03, +.30)
Crystal Group: Cubic

Spinel Many famous rubies in crown jewels around the world are actually spinels. The most famous is the Black Prince's ruby, and the The Timor Ruby,Spinel was recognized as a distinct gem variety only in the late 19th century through hardness and X-ray tests.Until then were mixed with Rubies due to similarity in color and brilliance.Spectacular colors are a hot pink and Red. Also comes in a range of gorgeous pastel shades of pink blue and purple. Cobalt Spinels, are very rare, found almost exclusively in Sri Lanka. Fine Red spinels are now rarer than Rubies.