I just love these vintage diamond bands for stacking. They make quite a statement. The ring is platinum with 9 genuine single cut diamonds. Ring exhibits old typical cut diamonds circa 1940's era. Each diamond is approx. 1-2 points. Front setting is approx. 3 mm. wide. The ring is marked "10% Iridium & platinum" and is engraved, "7-10-48." Weight 3.36 grams. US size, 5.5. Can be resized. Lovely ring.