שְׁבוּ‎ (shᵉbûw|sheb-oo'|noun|feminine|agate)
[Heb] שְׁבוּ‎, שְׁבֹו‎ ETCBC: שְׁבֹו‎ (subs|[precious stone]) OSHL: v.ao.af TWOT: 2311e GK: H8648
Derivation: from an unused root (probably identical with that of שָׁבָה‎ through the idea of subdivision into flashes or streamers (compare שָׁבִיב‎) meaning to flame;
Strong's: a gem (from its sparkle), probably the agate
KJV: agate.