Black Onyx and Black Spinel Triangle Pendant Necklace A round black onyx stone sits in the center of the pendant and is accented with sparkling round-cut black spinel stones The pendant measures 10 mm long and 15 mm wide Includes an 18 inch sterling silver box chain with spring ring clasp Be sure to check out our other freshwater pearl and gemstone jewelry, available in a variety of styles at shoppearlzocean.com!