Most importantly, her ring with an Old Mine cut diamond the size of a gigantic movie theater ice cube came courtesy of Kindred Lubeck of Artifex Fine Jewelry. Brides magazine interviewed Benjamin Khordipour, a specialist in antique and vintage jewelry, who estimated the rock's cost at around $550,000. The ring was handcrafted in 18k yellow gold and the center diamond is set with needle point prongs that perfectly match the antique style. Smaller diamonds and hand-engravings adorn the shoulders of her setting, Khordipour said.