18k gold Cobblestone cocktail ring by H. Stern, with pink tourmaline, Smokey quartz and 0.09ctw H/Vs diamonds. Ring size 7.5 (EU 56) , top is 26 x 25mm. Marked 2 M, 750, S hallmark. Weight 23 grams. Tourmaline Quartz, Diamonds Ring, Vs Diamond, Quartz Ring, Smokey Quartz, Ring Size 7, Cocktail Ring, Pink Tourmaline, Cocktail Rings