This is a beautiful ring by Tiffany & Co. Atlas Numerical Collection with sapphires. This 18k yellow gold band has approximately 1.75 of natural blue sapphires. This style ring with the thick band and sapphires is no longer available from Tiffany. Width is 12 mm. The ring is a size 6 3/4, weight 16.4 grams. Signed on the back by Tiffany & Co. 1995 and Italy.