Sapphire is any colour of the mineral corundum other than red, those are called Ruby, corundum is composed of aluminium oxide. Sapphires tend to be translucent or transparent and have high amounts of refraction. The most desirable sapphires are generally those with an intense blue colour with plenty of sparkle and life. Various shades of blue result from titanium and iron substitutions in the aluminium oxide crystal lattice. Some Sapphires show a 3-point or 6-point star or asterism. These Sapphires are cut into cabochons to display this effect. They can be found in Brazil, Tanzania, Sri Lanka, Kashmir, Thailand, Madagascar and Australia.

Colour : Shades of blue, other colours- padparadscha(salmon pink), pink and purple, orange and yellow, green, and colorless and black. Each category has its own color range.
Hardness : 9

Blue Sapphire is a stone of mental focus and order, as well as inner vision and psychic awareness. It can help open the third eye to receive wisdom and insight, and the throat chakra to communicate that vision to others.