[Fr., from Gk., from Heb.] A precious stone of a bright-blue color, next in hardness to the diamond, and next to the ruby in value. It is composed ofalumina, colored differently. The red sapphire is the Oriental ruby, the green sapphire is the emerald, the yellow the topaz, and the violet is the amethyst. Colorless or white sapphires are sold as diamonds. The finest blue sapphires come from Ceylon.