US Diamond Technologies, also doing business as Prism Gem LLC is a privately held company located in the heart of New York's Diamond District. We specialise in manufacturing CVD equipments and providing diamond processing services for both Natural and Synthetic Diamonds. Started in 2004, globally US Diamond Technologies is the only company to have full in-house capabilities for diamond manufacturing and processing including Irradiation and NRC certification, HPHT, Coating by Plasma Deposition, Laser Sawing, High Temperature Vacuum Annealing, Clarity Enhancement and Diamond Re-polishing. Since we do not outsource any of our services, we have a distinctive advantage of better pricing, more reliability and seamless service for our customers. Research Labs, Universities, Wholesalers, Retailers and Consumers worldwide have been using our services for over a decade. Diamonds processed by our labs are set in jewelry by leading jewelry manufacturers globally. These manufacturers supply diamond jewelry to leading retailers, television networks as well as independent retailers worldwide.