Place a setting of gemstones on it, four rows of stones:

The first row should be
a row of carnelian, topaz, and emerald;

They mounted four rows of gemstones on it. The first row was a row of carnelian, topaz, and emerald;

the second row,
a turquoise, a sapphire, and a diamond;

the third row,
a jacinth, an agate, and an amethyst;

and the fourth row,
a beryl, an onyx, and a jasper.

They should be adorned with gold filigree in their settings.

the second row, a turquoise, a sapphire, and a diamond;

the third row, a jacinth, an agate, and an amethyst;

and the fourth row, a beryl, an onyx, and a jasper. They were surrounded with gold filigree in their settings.