sapphire

sapphire is a Noun

Definition:

[1] Native alumina or aluminium sesquioxide, Al2O3; corundum; esp., the blue transparent variety of corundum, highly prized as a gem. of rubies, sapphires, and of pearlés white. Chaucer.

[2] The color of the gem; bright blue.

[3] Any humming bird of the genus Hylocharis, native of South America. The throat and breast are usually bright blue. Star sapphire, or Asteriated sapphire (Min.), a kind of sapphire which exhibits asterism.