|1.||a. any precious corundum gemstone that is not red, esp the highly valued transparent blue variety. A synthetic form is used in electronics and precision apparatus. Formula: Al2O3|
|b. (as modifier): a sapphire ring|
|2.||a. the blue colour of sapphire|
|b. (as adjective): sapphire eyes|
|[C13 safir, from Old French, from Latin sapphīrus, from Greek sappheiros, perhaps from Hebrew sappīr, ultimately perhaps from Sanskrit śanipriya, literally: beloved of the planet Saturn, from śani Saturn + priya beloved]|
Associated with diamonds (Ex. 28:18) and emeralds (Ezek. 28:13); one of the stones in the high priest's breastplate. It is a precious stone of a sky-blue colour, probably the lapis lazuli, brought from Babylon. The throne of God is described as of the colour of a sapphire (Ex. 24:10; comp. Ezek. 1:26).