which rock contains valuable minerals
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which rock contains valuable minerals, most valuable rocks and minerals, what rocks are valuable, interesting rocks and minerals, most valuable minerals on earth, what is the most valuable rock, minerals that contain valuable substances, minerals in a rock, list of valuable minerals, what is the most valuable mineral, minerals found in rocks, top 10 most valuable minerals, common minerals found in rocks, common minerals in rocks, rocks and minerals used in everyday life, what minerals rocks or gemstones, minerals that make up rocks, most important mineral on earth
