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Sapphire

Definition: Native alumina or aluminium sesquioxide, Al2O3; corundum;
esp., the blue transparent variety of corundum, highly prized as a gem.

Sapphire

Definition: The color of the gem; bright blue.

Sapphire

Definition: Any humming bird of the genus Hylocharis, native of South
America. The throat and breast are usually bright blue.

Sapphire

Definition: Of or resembling sapphire; sapphirine; blue.