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About product and suppliers:
        Alibaba.com offers 19,167 black agate products. About 12% of these are silver jewelry, 10% are loose gemstone, and 7% are necklaces. 

A wide variety of black agate options are available to you, such as natural, synthetic (lab created), and mineral gemstones. You can also choose from agate, onyx, and turquoise. As well as from round brilliant cut, asscher cut, and oval cut. And whether black agate is color play or fire, color change, or star. 

There are 19,058 black agate suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Thailand, which supply 71%, 25%, and 1% of black agate respectively. 

Black agate products are most popular in North America, Western Europe, and South America. 

You can ensure product safety by selecting from certified suppliers, including 1,910 with Other, 263 with ISO9001, and 87 with SA8000 certification.