'Enclosures' in the Bible

According to the work of an engraver in stone, as the engravings of a seal, shalt thou engrave the two stones with the names of the sons of Israel; surrounded by enclosures of gold shalt thou make them.

And thou shalt make enclosures of gold;

and two chains of pure gold; of laced work shalt thou make them, of wreathen work, and fasten the wreathen chains to the enclosures.

and the two ends of the two wreathen cords thou shalt fasten to the two enclosures, and shalt put them on the shoulder-pieces of the ephod, on the front thereof.

And they wrought the onyx stones mounted in enclosures of gold, engraved with the engravings of a seal, according to the names of the sons of Israel.

and the fourth row, a chrysolite, an onyx, and a jasper; mounted in enclosures of gold in their settings.