שְׁבוּshᵉbûw

a gem (from its sparkle), probably the agate

Pronunciation: sheb-oo' · Hebrew/Aramaic (Old Testament) · H7618

Meanings

a precious stone (Exodus 28:19; Exodus 39:12)

Same root

שָׁבָהshâbâh · H7617to transport into captivity
שָׁבִיבshâbîyb · H7632flame (as split into tongues)
שְׁבִיshᵉbîy · H7628exiled; captured; as noun, exile (abstractly or concretely and collectively); by extension, booty

Where it appears

Appears 2 times in the Bible.

Exodus 28:19 The third row will contain an orange jacinth, an agate, and a purple amethyst.
Exodus 39:12 The third row contained an orange jacinth, an agate, and a purple amethyst.

Source: Brown, Driver and Briggs, Hebrew and English Lexicon of the Old Testament (1906), public domain; markup by unfoldingWord, CC BY (github.com/unfoldingWord/Brown-Driver-Briggs-Enhanced).