The underground mine can today reach depths of more than 1,000 meters. The content of diamonds is decreasing with the depth. Underground mining is more expensive than open-pit mining and requires more complex management and machinery.Diamond Mining Machinery, Diamond Mining Machinery,,A wide variety of diamond mining machinery options are available to you, such as gravity separator, sprial separator, and magnetic separator. You can also choose from free samples, paid samples. There are 8,914 diamond mining machinery suppliers, mainly located in Asia.Diamond Mining Machines For Sale Wholesale, Mining,,Diamond mining machines for sale products are most popular in Southeast Asia, Domestic Market, and Africa. You can ensure product safety by selecting from certified suppliers, including 3,517 with ISO9001, 2,181 with Other, and 557 with ISO/TS16949 certification.