Ross Simons sterling silver ring with a large oval cut pink sapphire in a halo setting with a triangle shaped clear cubic zirconia on each side and smaller clear cubic zirconia surrounding. Size: 6 Stamped: 925, 6, R, & CHINA Sapphire tested with a Presidium gem tester. Most jewelry items are not tested, unless it is specified in the listing that it has been tested, all other items are described only by the stamps and markings, which I am happy to show pictures of.