Platinum, channel set diamond band by Tiffany & Co. 
 
 
Designer: Tiffany & Co 
Weight: 7.8 grams 
Width: 4.2 mm
Size: 5
Main Stone: Diamond 
Diamond Weight: (21) Approx. 2 CTTW
Metal Purity: Platinum
Hallmarks: TIFFANY & CO PT950
Condition: Preowned, Very Good 
Normal signs of wear