Five most important minerals
Summary:
After the 50 minerals meme Callan from the NOVA Geoblog is asking us what the 5 most important mineral are if we had to explain to a non-geologist.
Quartz: Many others already mentioned it. It is one of the toughest and most widespread minerals that everyone will get in touch with sooner or later. Also it is a major building stone of the continental crust and makes for nice juwelery in the form
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