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RUBY OVERVIEW
The rich red colour of the ruby comes from traces of chromium in a variation of the corundum mineral. It is the most valuable corundum mineral; another gemstone in this family includes the Sapphire. The gemstone has been valued for generations and is known as the 'king of precious stones' in ancient Sanskrit.
Outstanding
- - The ruby is often called Ratnaraj, which is Sanskrit, meaning the king of gems
- - Mogok is Myanmar's famous valley of rubies, the origin of many spectacular and globally famous gems
- - A 25.29-carat ruby ring sold for $32.4 Million in 2015, setting a new world record at auction for a coloured gemstone (~$1,266,901 per carat)
Technical Facts
- Mineral: Corundum
- Chemistry: Al2O3
- Colour: Red
- Refractive index: 1.762 to 1.770
- Birefringence: 0.008 to 0.010
- Specific gravity: 4.00 (+/- 0.05)
- Mohs Hardness: 9
