Kevin Jonas, the oldest member of The Jonas Brothers, recently to his girlfriend Danielle Deleasa, 21, who he has been dating for two years. Kevin Jonas turned to Jacob & Co. for the engagement ring. He worked closely with the jeweler to create the ring. The future Mrs. Jonas' Jacob & Co. ring is crafted in platinum and features a solitaire cushion-cut diamond, with a total weight of 3 carats. Surrounding the center stone are 210 round brilliant-cut pave diamonds totaling .72 carats.