“And the foundations of the wall of the city were garnished with all manner of precious stones. The first foundation was jasper; the second, sapphire; the third, a chalcedony; the fourth, an emerald;” (Revelation 21:19 KJV)
Avian and Attributes – Sapphire
SAP’PHIRE, n. [L. sapphirus; Gr. to scrape, to shine, to be fair, open, beautiful.]
A species of silicious gems or minerals, of several varieties. In hardness it is inferior to the diamond only. Its colors are blue, red, violet, yellow, green, white, or limpid, and one variety is chatoyant, and another asteriated or radiated.
Sapphire is a subspecies of rhomboidal corundum.
The oriental ruby and topaz are sapphires.
Sapphire is employed in jewelry and the arts.
[Definitions from Webster’s Dictionary of American English (1828), unless noted. Bird info from Wikipedia plus.]