I think it’s the inscription that really does it.
“We are selling this beautiful authentic Tiffany & Co. Ring. The width is 4.5MM. The ring size is 9 3/4. It is stamped with “Tiffany & Co. PT950″ It weighs 9.9G. It also has an engraving that reads “Always Worth It Baby!” It comes with small soft Tiffany Bag. $1,100″