šᵊvō שְׁבוֹ ‘agate’ (Hebrew)

Etymology^?: from an unused root probably identical with that of šāvā שָׁבָה ‘to take captive’ through the idea of subdivision into flashes or streamers) meaning to flame, compare šāvīv שָׁבִיב ‘flame’

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