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About product and suppliers:
        Alibaba.com offers 21,803 black agate products. About 13% of these are pendants & charms, 11% are semi-precious stone crafts, and 9% are loose gemstone. 

A wide variety of black agate options are available to you, such as free samples, paid samples. 

There are 21,698 black agate suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Brazil, which supply 73%, 23%, and 1% of black agate respectively. 

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

You can ensure product safety by selecting from certified suppliers, including 1,872 with Other, 261 with ISO9001, and 74 with BSCI certification.