One of a Kind Pendant has exquisite Spencer Mountain Opal bezel set in sterling silver. The stone shows brilliant rainbow of fire that is not truly visible in the picture. The overall height is about 1.5″ including the bail, and 3/4″ wide and 1/4 inch thick, the opal cab is 8 mm. Total piece weight is 9 grams. The bail has an opening that will accommodate a 3/16 inch diameter chain. It comes on a 16″ long/short sterling chain, but just request any length you need and we can offer you other choices.