Sapphire is corundum, the same type of mineral as ruby, except that it is not red. Sapphire is famous for its blue color, but it also comes in many other colors, such as orange and pink. They are called fancy sapphires. There are also color change sapphires which change color under different lighting. Some sapphires even show a phenomenon called asterism. A star appears on the face of the stone.
Sapphire is often thought of as a blue gem, but it comes in all colors except red. Red would be a ruby.
A Royal Ring
England’s Prince William gave Kate Middleton a blue sapphire engagement ring. It belonged to his mother, the very famous and beloved Princess Diana.
This is the Star of Asia, one of the world's largest blue star sapphires. It weighs 330 carats, a little smaller than a golf ball. The star phenomenon is called asterism.
what's in a name?
Sapphire’s name is from a Greek word meaning “blue.”