Brown-Driver-Briggs (BDB)
H7618
H7618 שְׁבוֹ n.[f.] a precious stone (relation to above √ dub.; = As. šubû ; 𝔊 𝔙 agate );— Ex 28:19 = 39:12 (+ לֶשֶׁם , אַחְלָ֑מָה ).
Brown-Driver-Briggs Hebrew Lexicon (BDB), 1906 — public domain
Strong's H7618 · Hebrew
shbuw
sheb-oo'
from an unused root (probably identical with that of 7617 through the idea of subdivision into flashes or streamers (compare 7632) meaning to flame; a gem (from its sparkle), probably the agate