answersLogoWhite

0

Sapphire is the name given to the blue variant of crystals of a substance called Corundum = Aluminium Oxide Al2O3.

Sapphires are graded on the intensity of their colour and clarity but there is also a variant called a "Star Sapphire" which has internal crystal arrangement that cause it to display an asterism in the form of a six-rayed star.

User Avatar

Wiki User

8y ago

What else can I help you with?