Ruby and Sapphire: Gems of the Mineral Corundum - GeologyRed corundum is a ruby. Blue is a . Rubies: The most desired variety of corundum is the ruby. . These enter the fractures during the heat treatment process.procedure corundum ruby crusher operation,grinder and polisher - Metalco Testingcorundum except red. The Sapphire is acid and . Jade is known as an opaque, light green jewelry stone. Jade ruby. Topaz. 2 . sample preparation procedure and consists of several steps. . automating grinding and polishing operations.Heat Treating Corundum: The Bangkok Operation - GIAthe technical aspects of heat treating ruby and sapphire, the author reports his personal observations of the actual heat treatment process in Bangkok. He.
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