Urim & Thummim: Real Stones engraved in Paleo Hebrew, Oval to round in shape. Shape and size may vary slightly. The real stones are about 1 1/8 inches long by about 7/8 of an inch wide. Real Stones Used for the Urim and Thummim in ancient times. Stones come in a black velvet bag with information about them. History: Urim and Thummim Exodus 28:30 “And thou shalt put in the breastplate of judgment the Urim and Thummim; they shall be upon Aaron’s heart when he goeth in before the Lord.” The Urim and Thummim was God’s way of answering His people. Urim (אורים) means light and Thummim (תמים) probably means darkness/truth. Possible recreation; Urim, white stone means no for an answer, and Thummim black stone means yes.