#7618 שְׁבוֹ sh@buw {sheb-oo'}

 from an unused root (probably identical with that of H7617 through
    the idea of subdivision into flashes or streamers [compare
    H7632] meaning to flame); TWOT - 2311e; n f

—Hebrew Word Study (Transliteration-Pronunciation Etymology & Grammar)

 1) a precious stone (in the high priest's breastplate)
    1a) probably an agate

—Brown-Driver-Briggs (Old Testament Hebrew-English Lexicon)

—Strong's (Hebrew & Chaldee Dictionary of the Old Testament)

—NAS Exhaustive Concordance of the Bible with Hebrew-Aramaic and Greek Dictionaries

 AV - agate 2; 2

—Exhaustive Concordance (KJV Translation Frequency & Location)