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About product and suppliers:
        Alibaba.com offers 2,105 diamond tester products. About 35% of these are jewelry tools & equipment, 25% are hardness testers, and 14% are testing equipment. 

A wide variety of diamond tester options are available to you, such as testers & measurements, engraving tools, and rotary tools & accessories. You can also choose from free samples, paid samples. 

There are 2,143 diamond tester suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Turkey, which supply 96%, 2%, and 1% of diamond tester respectively. 

Diamond tester products are most popular in North America, Southern Europe, and Northern Europe. 

You can ensure product safety by selecting from certified suppliers, including 588 with ISO9001, 249 with Other, and 39 with ISO14001 certification.