The 10mm round-cut black diamond Swarovski element crystal tennis necklace is designed with great attention to detail, ensuring an irresistible sparkle. Each crystal is delicately set against an 18k gold or rhodium-plated brass backdrop, exuding timeless allure. This necklace can effortlessly add sophistication to any ensemble, be it a glamorous affair or a casual outing. Measuring 17 inches in length with a 2-inch extension, this stunning piece is destined to be cherished in your jewelry collection for years to come.