This is a sterling silver (marked) cubic zirconia (CZ) tennis necklace. The necklace features 134 sparkling, Princess-cut (square) CZs that are approximately. If these were diamonds, that would be approximately 20 carats. The necklace is 16 inches long, 1/8 inch wide, and weighs 33.6 grams. The necklace has a box clasp and safety catch. It is well-made and in excellent condition. Thank you for your interest.