DIAMOND
(a) Heb. “yahalom.” Appears in Ex. 28:18; 39:11; cannot be identified. In Ez. 28:13 is translated “jasper” in the 1960 and 1977 revisions, while in the old it is translated “diamond.”
(b) It only appears in the passages cited, and cannot be truly identified. It is generally held that it is not what is now known as a diamond.
(c) In Jer. 17:1 and Ez. 3:9 the term is “shamir.” It is believed to be corundum, a stone of great hardness, but since it has different colors it now has several names.