Brown-Driver-Briggs (BDB)
H3095
H3095 יַהֲלֹם n.[m.] a precious stone, jasper ? (so 𝔊, 𝔙), or onyx ? (appar. fr. √ הלם ; owing to its hardness, as able to smite , hammer ?)—mentioned in lists of precious stones Ex 28:18 39:11 Ez 28:13 .
Brown-Driver-Briggs Hebrew Lexicon (BDB), 1906 — public domain