Here is the medium sized Peretti Floating Heart for Tiffany & CO. This pendant is 3/4" by 3/4" and weighs 5.6 grams. It is authentic and hallmarked:Tiffany & CO:Peretti:750 (for 18 K) and Spain for site of manufacture.
It is in excellent estate condition and has a lovely sentiment.
Estate 18K Tiffany & Co Retired Medium Peretti Floating Heart