A diamond from Diamond Marketplace has been valued by professional diamond dealers and given a fair retail value based on it's GIA certificate details. The price is competitive to other online diamond retailers, providing proper value to the owner of a diamond and a great price to the buyer of a diamond. By cutting out all intermediaries and connecting private sellers and buyers, everyone wins. All diamonds listed on Diamond Marketplace are authenticated and are required to pass strict quality control by diamond experts providing transparency and trust for both sellers and buyers.