Similar to Kelly Blue Book for cars or Zillow for residential real estate, SellMy.Jewelry provides that instant estimated cash value for fine diamond jewelry using a proprietary advanced statistical algorithm updated weekly. SellMy.Jewelry is the first web-based company to offer such a tool. Joseph Dolginow, a fourth generation jeweler with a background in data science and economics built SellMy.Jewelry using expertise and data from his family’s jewelry store.