Ouches are cavities, sockets, or settings in which precious stones are mounted. In the biblical descriptions of the high priest’s garments, the term refers especially to gold settings enclosing the engraved onyx stones and the twelve stones of the breastplate. The word can also denote an enclosing structure of gold or silver. The settings may have been formed from woven or twisted wire worked around the stones in a filigree-like manner.
The term occurs chiefly in Exodus in descriptions of the high priest’s ephod and breastplate. The two onyx stones were enclosed in gold settings, and the twelve stones on the breastplate were likewise enclosed in gold. A related use appears in Psalm 45:13, describing clothing worked or embroidered with gold.
The word is now archaic and was used for cavities or sockets holding gems. The biblical settings were apparently not solid blocks of gold, but may have consisted of wire woven or wreathed around the stones.