16. It is to be square and folded double, 22 centimetres long and 22 centimetres wide.
17. Mount four rows of precious stones on it; in the first row mount a ruby, a topaz, and a garnet;
18. in the second row, an emerald, a sapphire, and a diamond;
19. in the third row, a turquoise, an agate, and an amethyst;
20. and in the fourth row, a beryl, a carnelian, and a jasper. These are to be mounted in gold settings.