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Due to a dramatic increase in the number of treated and synthetic diamonds and gems appearing in the marketplace within the past decade we saw a need for more expert knowledge in testing and detecting various treatments and screening for synthetics. In response to this need we offer not only books with a broad range of topics crucial to Jewellers, Gem Dealers and Appraisers but also tools & instruments to aid in detection. These products will enable diamond and gem trade professionals to maintain a competitive advantage by helping with accurate identification and appraising to use in conjunction with buying or selling diamonds and gems.