Luxury designer Isaac Mizrahi has dabbled in the fine jewelry sector of the fashion industry before, but after selling his self-titled label to Xcel Brands, Inc., in 2011, we've seen mostly beauty and garment items that have launched at Bloomingdale's and Nordstom bearing his name. But that's all about to change, as Xcel has just signed an exclusive agreement with Clover Corp. to produce and distribute a high-end jewelry collection under Mizrahi's name. Platinum and 18-kt gold-plated sterling silver pieces with diamonds and colored gemstones will drop in the fall, and will range in price from $200 to $1,500.