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About product and suppliers:
        Alibaba.com offers 4,200 blue slate products. About 11% of these are slate, 2% are paving stone. 

A wide variety of blue slate options are available to you, such as black, rusty, and blue. You can also choose from split, machine-cut, and bush hammered. As well as from cut-to-size, tile, and thin slab. And whether blue slate is antacid, or non-antacid. 

There are 4,200 blue slate suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of blue slate respectively. 

Blue slate products are most popular in North America, South America, and Africa. 

You can ensure product safety by selecting from certified suppliers, including 1,070 with ISO9001, 199 with Other, and 51 with ISO14001 certification.