^18-20 The city itself was pure, transparent gold like glass! The wall was made of jasper, and was built on twelve layers of foundation stones inlaid with gems: the first layer^[a] with jasper; the second with sapphire; the third with chalcedony; the fourth with emerald; the fifth with sardonyx; the sixth layer with sardus; the seventh with chrysolite; the eighth with beryl; the ninth with topaz; the tenth with chrysoprase; the eleventh with jacinth; the twelfth with amethyst.