Exodus 28:17-20

28:17 You are to set in it a setting for stones, four rows of stones, a row with a ruby, a topaz, and a beryl – the first row; 28:18 and the second row, a turquoise, a sapphire, and an emerald; 28:19 and the third row, a jacinth, an agate, and an amethyst; 28:20 and the fourth row, a chrysolite, an onyx, and a jasper. ¹  They are to be enclosed in gold in their filigree settings.

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¹ sn U. Cassuto (Exodus, 375-76) points out that these are the same precious stones mentioned in Ezek 28:13 that were to be found in Eden, the garden of God. So the priest, when making atonement, was to wear the precious gems that were there and symbolized the garden of Eden when man was free from sin.