Blue sapphire, jeweler's quality.
Brilliantly cut and can be baked in the clay.
Be careful not to rinse cold after baking because of cracking of the stone.
This stone is a laboratory-made synthetic sapphire and therefore safe to bake in the silver clay.
Very suitable for rings. Synthetic corundum can withstand heating, polishing and ultrasonic. Do not cover with boric acid or borax, etc., this can damage the stone when heated.
Hardness: 9
Contents:
1 piece 2.5mm
