Ruby - WikipediaA ruby is a pink to blood-red colored gemstone, a variety of the mineral corundum (aluminium . After color follows clarity: similar to diamonds, a clear stone will command a premium, but a ruby without any needle-like rutile inclusions may.stone corundum ruby crusher dengan,Ruby and Sapphire: Gems of the Mineral Corundum - GeologyRed corundum is a ruby. Blue is a sapphire. A corundum of any other color is a fancy sapphire. Synthetic corundums offer consumers stones of great color and.
The GIA Laboratory uses a controlled set of comparison stones called masterstones to determine if corundum is ruby or if it's pink, purple, or orange sapphire.
Ruby is the most valuable variety of the corundum mineral species, which also includes sapphire. It is very important in colored stone market.
Gem-quality corundum is also quite rare. These factors make both varieties of corundum some of the most highly desired jewelry stones. Ruby is the red variety.