The garnets fracture more easily and drift with the sand. the diamonds move with ... "Obviously they had dug loads of diamond-bearing gravel and brought them ... a iron or copper mines and drop the ore into huge machines that crush, sift and...
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Get Price12:185-21.7, Miscellaneous equipment and machinery. 12:185-21.8 ... The term "mine" shall also include quarry, sand pit, gravel pit, clay pit and shale pit.
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