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About product and suppliers:
        Alibaba.com offers 18,787 black agate products. About 11% of these are loose gemstone, 11% are semi-precious stone crafts, and 2% are stone beads. 

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

There are 18,692 black agate suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Brazil, which supply 72%, 24%, 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 1,995 with Other, 270 with ISO9001, and 90 with SA8000 certification.
        
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