Strong's H7718 · Hebrew

shoham

sho'-ham

from an unused root probably mean to blanch; a gem, probably the beryl (from its pale green color)

Scholarly Lexicons

Brown-Driver-Briggs (BDB)

 H7718 שֹׁ֫הַם a gem , identif. dubious (√ unknown)  

Brown-Driver-Briggs Hebrew Lexicon (BDB), 1906 — public domain