יַהֲלֹם (yahălômyah-hal-ome'noun|masculinejasper)
[Heb] יַהֲלֹם, יָהֲלֹם ETCBC: יַהֲלֹם‎ (subs|precious stone) OSHL: e.bq.ad TWOT: 502b GK: H3402 Greek: ἴασπις, σμάραγδος
Derivation: from הָלַם (in the sense of hardness);
Strong's: a precious stone, probably onyx
KJV: diamond.