How to Identify Someone as a Priest

Aaron is to bear the names on his shoulders as a memorial before the Lord. The first row shall be Carnelian, Chrystallite and Beryl. Second row shall be Turquoise, Lapis, Lazuli and Emerald. Third row shall be Jassen, Agate and Amethyst. Fourth row shall be Topaz, Onyx and Jasper. Mount them in gold filigree settings. Each engraved like a seal with the name of one of the 12 tribes.