Exodus 25:7
Onyx stones, and stones to be set in the ephod, and in the breastplate.
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Exodus 35:9
And onyx stones, and stones to be set for the ephod, and for the breastplate.
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What is the meaning of Pishon in the Bible? | GotQuestions.org

What does the Bible say about crystals? | GotQuestions.org

Summary of the Book of Ezekiel - Bible Survey | GotQuestions.org

Onyx: Dictionary and Thesaurus | Clyx.com

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