The appearance of gold in nature
The process of gold mine formation
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- $13.99
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- $13.99
Publisher Description
The content of gold in the earth′s crust is only 0.011 ppm, and it is unevenly distributed, that is, only under special geological conditions can there be gold mines, plus people think that gold is beautiful, so it is cherished by people. In this topic, we introduce gold samples from major gold producing areas, as well as the principles of detecting gold deposits and the formation of gold deposits.