Mineral exploitation

Metallic and non-metallic minerals

Metallic	Non-Metallic
Iron (740 Mta$^{-1}$)	Gemstones
Aluminum (40 Mta$^{-1}$)	Sand
Manganese (22.4 Mta$^{-1}$)	Gravel
Copper (8 Mta$^{-1}$)	Salt
Chromium (8 Mta$^{-1}$)	Limestone
Nickel (0.7 Mta$^{-1}$)	Soil
	Phosphates