Sapphire belongs to the family corundum.
All corundum that is of gem quality and not red is called sapphire.
Many believe that the sapphire is blue, but in reality there are lots of colors of sapphire.
The colors depend on what contaminants are present.
Fine Sapphires are found in Myanmar (Burma), Sri Lanka and India.
Sapphires are also found in Thailand, Australia, and Nigeria.
These sapphires are dark blue and can draw against black. Furthermore, there are sapphires in Kenya, Cambodia,
Colombia, Brazil and more.
Crystal structure: Trigonal
Composition: Aluminum oxide
Refractive index:1.76 to 1.77