Yahelom Exodus 28:18Ezekiel 28:13Shamir Jeremiah 17:1Ezekiel 3:9Zechariah 7:12

Apparently Alexander the Great around 330 B.C. first discovered diamonds for the western world in India. This would indicate “diamonds” are not meant in the Old Testament references. Emery stones or adamant stones were widely used for engraving. Emery was a variety of corundum and was composed of aluminum oxide.