Brand: Tiffany & Co Rank A Size 45 cm (17.72 in) Material YG yellow gold Comment Atlas Collection (Material) 750YG (Length) 45 cm (17.72 in) (Top) Diameter 29.8 mm (1.17 in) (Total Weight) 8.6g Tiffany & Co. Atlas Open Necklace is now in stock. A Necklace with a large presence However. Since it is an open work design. It does not give a heavy impression and creates a stylish presence. The symbolic Roman numerals unique to Atlas are very nice. If you like Tiffany & Co. This necklace has a design that can be recognized at a glance. So don't miss it.