Oris Nelson Enterprise is a manufacturer of the highest quality jewelery tools available. Oris Nelson's product line includes diamond testers, electronic gold testers, moissanite testers, pressurized steam cleaners, ultrasonic cleaners, and digital gem gauges. Many of these products are manufactured here at their factory in the United States and they are all backed by a full parts and labor warranty. Oris Nelson is a home to famous RS Mizar brand of jewelry testers.