Suggest an update Name* Categories* State* Locality* ZIP* Street address* Phone* Website* Company description* You have visited the company page Diamond Price Checker, which is in category certified diamonds. The legal address of the company is 20 Hanover Square, Mayfair, London W1S 1JY. For more information, call 02031787562 Your comments* (not for publishing) * — Required information Diamond Price Checker ← View details 20 Hanover Square, Mayfair, London W1S 1JY, United Kingdom, Mayfair, London 02031787562