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About product and suppliers:
        Alibaba.com offers 231 lab certified gemstone products. About 90% of these are loose gemstone, 1% are silver jewelry. 

A wide variety of lab certified gemstone options are available to you, such as ruby, emerald, and turquoise. You can also choose from natural, mineral gemstones, and synthetic (lab created). As well as from emerald cut, round brilliant cut, and oval cut. And whether lab certified gemstone is color change, star, or iridescence/iridescent. 

There are 231 lab certified gemstone suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Hong Kong, which supply 49%, 44%, and 4% of lab certified gemstone respectively. 

Lab certified gemstone products are most popular in North America, Western Europe, and South America. 

You can ensure product safety by selecting from certified suppliers, including 42 with Other, 4 with ISO9001, and 2 with OHSAS18001 certification.