The ring is a sizable 6 1/2 and weighs 3.8 grams. It is 8.9 mm wide, has a 5mm profile and a 1.7 mm shank. They look very good with no obvious inclusions or black spots.
I would say they are close to or better than commercial grade stones. The item "Vintage Antique 3 Stone Diamond 14K White Gold Art Deco Filigree Cocktail Ring" is in sale since Thursday, August 30, 2018.This item is in the category "Jewelry & Watches\Vintage & Antique Jewelry\Fine\Art Nouveau/Art Deco 1895-1935\Rings". The seller is "tennisplayer69972" and is located in Desoto, Texas. This item can be shipped to United States.