Engraving: On the Stones Set in the Priest's Breastplate
Source: Nav
Exodus 28:9–11, 21, 36
Take two onyx stones and engrave on them the names of the sons of Israel: / six of their names on one stone and the remaining six on the other, in the order of their birth. / Engrave the names of the sons of Israel on the two stones the way a gem cutter engraves a seal. Then mount the stones in gold filigree settings.
Exodus 39:8–14
He made the breastpiece with the same workmanship as the ephod, with gold, with blue, purple, and scarlet yarn, and with finely spun linen. / It was square when folded over double, a span long and a span wide. / And they mounted on it four rows of gemstones: The first row had a ruby, a topaz, and an emerald;