Synthetic corundum can withstand high temperature above 1800℃.

Mohs scale hardness is 8.8.

Density 3.9-4.1g/cm3.

The difference between sytnthetic ruby corundum and ruby is the hardness. The hardness of ruby is 9 on the Mohs scale, which is only better than diamond, but the hardness of synthetic ruby corundum is slightly lower at 8.8.

The hardness and toughness:

Hardness: white corundum>red corundum>brown corundum;

Toughness: brown corundum>red corundum>white corundum.

At Zhuo Fan Gems, you can buy the Sapphire Ruby#3 Corundum stones at Wholesale Direct Factory prices from the China Professional Manufacturer and supplier.

Low, Low factory prices from China Wuzhou – the biggest synthetic gemstones manufacturing city in the world.

All sizes and shapes are available.

Contact us for a Quote: info@wzzfgems.com