sapphire

If your grandmother gives you her sapphire ring, it will probably have a translucent blue stone on it, though you may end up with a rare yellow sapphire.

This blue gemstone is commonly known as the birthstone for those born in September. The word sapphire has been kicking around English for more than 700 years and enjoyed at least two dozen spellings before settling on the current, counterintuitive one. The Greek origin, sappheiros, means "blue stone," although it probably refers not to the sapphire but to another blue stone, the lapis lazuli.

Definitions of sapphire
1

n a precious transparent stone of corundum, typically a rich blue, valued as a gemstone

Types:
star sapphire
a sapphire that when cut shows a starlike figure in reflected light because of its crystalline structure
Type of:
corundom, corundum
very hard mineral used as an abrasive
transparent gem
a gemstone having the property of transmitting light without serious diffusion

n a transparent piece of sapphire that has been cut and polished and is valued as a precious gem

Type of:
gem, jewel, precious stone
a precious or semiprecious stone incorporated into a piece of jewelry

n a light shade of blue

Synonyms:
azure, cerulean, lazuline, sky-blue
Type of:
blue, blueness
blue color or pigment; resembling the color of the clear sky in the daytime

adj of something having the color of a blue sapphire

sapphire eyes”
Synonyms:
chromatic
being or having or characterized by hue

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