Black Spinel faceted rondelles measure approximately 7mm to 8mm in diameter, have a slightly metallic luster, exhibit no external characteristics of matrix stone, have a symmetrical rondelle shape resembLing two sequin shapes set concave-side to concave-side, are of excellent make and the opaque body is a black hue with extremely high brilliance. This Black Spinel strand would make a fabulous night out on the town necklace!