This is a black with a gray streak natural stone pendant set in a silver bezel with pendant hanger. We believe that it came from Mexico and is set in marked silver. We do not know the exact type of stone this is. It measures 2" long (without including the hanging loop) and 1.5" wide and 1/8" thick. Great to wear on a chain or incorporate into a neckpiece. There are no cracks, chips or wear.