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Mineral mining
The extraction of valuable minerals or other geological materials from the earth for economic interests.
Industry: Mining
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Mineral mining
manganandalusite
Mining; General mining
紅柱石包含 6.91%錳 2 O 3 的各種行動。它不同于普通紅柱石強多色性及其芳草綠顏色的 。從 Vestana，瑞典。
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