sapphire

A clear hard variety of corundum used as a gemstone that is usually blue but may be any color except red.

A corundum gem.

The blue color of a gem sapphire.

Made of or resembling a gem sapphire.

Having the color of a blue sapphire.

A precious stone next in hardness to the diamond, and nearly as valuable when of fine quality: a variety of the mineral corundum.

The color of the sapphire; blue.

In heraldry, a tincture, the color blue, in blazoning by means of precious stones. Compare blazon, n., 2.

In ornithology, a sapphirewing.

Resembling sapphire; of a deep brilliant blue.