YAG Blue Sapphire Imitation Princess Cut

Few Stones from 12 to 8mm size.
YAG - Yttrium Aluminum Garnet. Very good Kashmir Blue Sapphire imitation, darker vivid blue hue with SubAdamantine Luster. Stones have perfect AAA cut quality
Produced in RF only in late 90-s by the Horizontal Directional Crystallization method