Diamond tennis necklaces combine understated brilliance with remarkable versatility. Also known as rivière necklaces — from the French word for 'river’ — the design refers to a continuous, shimmering row of diamonds. Houses such as Tiffany & Co., Harry Winston and Cartier continually reinterpret the classic silhouette through refined settings, mixed metals and varying diamond cuts. The result is a necklace that feels polished yet modern, perfectly balancing elegance with everyday wearability.