With diamonds getting more and more attention, jewelers need to have the best equipment for grading diamonds. We at nationaljewelersupplies.com have a great selection of diamond grading and lighting devices to ensure quality grading at competitive prices. We offer CZ Master Sets, Diamond Grading Lamps, UV Detection Lamps, and more to help you correctly identify the cut and color in the most accurate way possible. Our CZ Master sets by Gemoro come in five or ten stone sets and you can buy them in either one half or one carat stone sizes. Each stone is expertly graded to a master diamond color using the standard GIA grading scale by the leading lab specialists for over a decade.