One interpretation of gems that represent the 12 tribes - It's thought that the Exo.28 stones corresponds w birth order, stone names are an English attempted approximation of the Hebrew stone: Reuben, sardius; Simeon, topaz; Levi, carbuncle; Judah, emerald; Dan, sapphire; Naphtali, diamond; Gad, opal/ligure; Asher, agate; Issachar, amethyst; Zebulon, beryl; Joseph, onyx; Benjamin, jasper. This layout aligns with Israel's camp (Num.2). "The 12 foundational stones of the New Jerusalem" - Rev.21.
