Exodus 28:17-21

17 You shall set in it four rows of stones. A row of carnelian, chrysolite, and emerald shall be the first row;
18 and the second row a turquoise, a sapphire and a moonstone;
19 and the third row a jacinth, an agate, and an amethyst;
20 and the fourth row a beryl, an onyx, and a jasper; they shall be set in gold filigree.
21 There shall be twelve stones with names corresponding to the names of the sons of Israel; they shall be like signets, each engraved with its name, for the twelve tribes.