Ruby

Natural Ruby
ruby is a pink to blood-red gemstone, a variety of the mineral corundum.Ruby has been the world’s most valued gemstone for thousands of years. It was said to be the most precious of the twelve stones God created when he created all things and this “lord of gems” was placed on Aaron’s neck by God’s command.
Color: red, orangey red, violetish red
Categories: precious stone
Chemical Composition: AL2O3
Crystal Group: Hexagonal
Refractive Index: 1.759-1.778
Hardness: 9
Density: 4
Occurrence: Burma, Thailand, East Africa, Vietnam, Madagascar.