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About product and suppliers:
        Alibaba.com offers 241,903 cz products. About 25% of these are silver jewelry, 11% are loose gemstone, and 5% are copper alloy jewelry. 

A wide variety of cz options are available to you, such as zircon, amethyst, and quartz. You can also choose from round brilliant cut, oval cut, and heart cut. As well as from iridescence/iridescent, color play or fire, and pleochroic/pleochroism. And whether cz is synthetic (lab created), natural, or mineral gemstones. 

There are 234,964 cz suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Hong Kong, which supply 89%, 6%, and 1% of cz respectively. 

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

You can ensure product safety by selecting from certified suppliers, including 56,286 with Other, 10,980 with ISO9001, and 1,095 with ISO14001 certification.