USGS Frequently Asked Questions

Question: How do we get minerals?

Answer:

Minerals must be mined from the ground, either by surface, underground, or drilling methods. Sand and gravel is usually mined in surface pits or rock is crushed to size, gold is mined in surface pits, underground mines, and in streams and rivers.

Source of this FAQ:
http://minerals.usgs.gov/west/factfaq.shtml

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