What is Tiffany rose gold made of?

Tiffany & Co. features a rose gold called Rubedo, which is reported to be made of small parts of silver and zinc, 55% copper and only 31% gold; however, this information is not verified by Tiffany. It should be noted that most rose gold is gold mixed with copper and thats where the rosy hue comes from. Shop a collection of properly vetted vintage and new Tiffany jewelry from some of the worlds top boutiques on 1stDibs.