Smith's Bible Dictionary
Sapphire. (Hebrew, sappir). A precious stone, apparently of a bright-blue color, Exodus 24:10; set as the second stone, in the second row, of the high priest's 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, namely, the azure or indigo-blue, crystalline variety of corundum, but our lapis lazuli (ultra-marine).
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Smith, William, Dr. Entry for 'Sapphire'. Smith's Bible Dictionary. https://www.studylight.org/dictionaries/eng/sbd/s/sapphire.html. 1901.