"The trend in shapes, like oval and emerald cut, allow a stone to have more surface area so the diamond appears larger with less carat weight." Hailey Baldwin's Solow & Co. sparkler was designed by Justin Bieber, who confirmed that he sees Hailey's face when he looks at the diamond he chose. Hailey's thin 18K gold band offsets the large stone even more, which really makes it pop. No close-up necessary.