Onyx. Genesis 2:12; Exodus 28:9; Exodus 28:20; Exodus 35:9; Exodus 35:27; 1 Chronicles 29:2; Job 28:16; Ezekiel 28:13. Opinions differ as to the gem intended by this word; some prefer translating it "beryl." The onyx has its particles arranged in parallel layers; white alternating with blue, gray, or brown. It was much used by the ancients for cameos.