Rough stone for faceting - Cobalt Spinel Neon Blue Czochralski (Pulled) lab grown 17-20ct

Lab-created Spinel 
Growing method: Czochralski
Czochralski, or another name Pulled, process carries the same physical and chemical properties as natural spinel.
Advantages of the Czochralski method: the method allows to grow a bigger size and better clarity crystals that rarely can be found in nature. Comparing to flame fusion method, crystals grown by Czochralski method almost don't have air bubbles.

Color: Neon Blue
Clarity: loupe clear
Size: L14.3-15.2 x W9.5-10.9 x H6.9-7.2mm 
Weight: 17-20ct

Main Formula    MgAl2O4
Mohs Hardness    7.5 to 8.0 (Mohs)
Crystal system    Cubic
Refractive Index    1.719
Specific gravity    3.9

For wholesale, please send request with desired quantity and size