“You are to make a plate ¹  of pure gold and engrave on it the way a seal is engraved: ²  “Holiness to the Lord.” ³ 

You are to engrave the two stones with the names of the sons of Israel with the work of an engraver in stone, like the engravings of a seal; ¹  you are to have them set ²  in gold filigree ³  settings.

The stones were for the names of the sons of Israel, twelve, corresponding to the number of ¹  their names. Each name corresponding to one of the twelve tribes was like the engravings of a seal.