The item is a lab created oval opal pendant with a 18 to 20 inch chain. The chain has a spring ring catch on the end. Depending where you hook up the catch on the extension will determine the length. The opal measures 6 x 4 millimeters the stone has a lot of color. The stone is held in with four prongs. The item weighs 1.8 grams. I will provide a earring box. This item is made of sterling silver.