Lady's 18K Yellow Tiffany & Co. "Atlas" Ring Ring Size: 6 (font color=red>Important! Only Tiffany can size this ring!) Contains: Approx. 1 ct Raspberry Red Rubies Tiffany & Co. Authentic Tiffany & Co. Stunning 18k Yellow Gold & Ruby Ring. Size 6 and weighs 16.5 grams of Tiffany 18k gold and raspberry red rubies . It measures .55 inch wide and holds approximately 1 carat of princess cut bright crisp rubies. These stunning stones are beautifully set in 18k gold.. This gorgeous ring is 100 % authentic and in excellent condition. Fully engraved: Tiffany & Co 1995 750 ITALY. This brilliant ring is no longer in production and has become highly collectible