XX (Heb. sappir ), a precious stone, apparently of a bright-blue color, set: ( Exodus 24:10 ) the second stone in the second row of the high priests breastplate, ( Exodus 28:18 ) extremely precious, ( Job 28:16 ) it was one of the precious stones that ornamented the king of Tyre. ( Ezekiel 28:13 ) The sapphire of the ancients was not our gem of that name, viz. the azure or indigo-blue, crystalline variety of corundum, but our lapis lazuli (ultra-marine ).