Corundum Var. Sapphire (350 Carat Crystal)
Ratnapura, Ratnapura District, Sabaragamuwa Province, Sri Lanka
Small Cabinet, 7.4 x 2.2 x 2.2 cm, 350 ct
A complete, large, sharp Sapphire crystal from the gem gravels of Sri Lanka. Unusually, it is colorless! These crystals are usually heat-treated, and might turn into a variety of shades for the gem trade in cut stones. The faces, which have moderate to fair luster, are either finely striated or have a very unusual, almost dentritic pattern (growth pattern or etching - not sure). The single crystal is translucent to gemmy. Although the terminations show some wear, the edges have remained remarkably sharp. An impressive, large, 350 ct Sapphire.