It is gold.
gasoline and coal
plate tectonics
Carbonates are the second most important mineral group.
mineral oil
grapes
Pennsylvania's most important mineral is coal. Second is oil.
Gravel
water
Calcium is the most important mineral for healthy bones, especially for women.
The most important minerals for uranium are pitchblende, carnotite, uraninite.But uranium is also a by-product of mines for gold, phosphates, vanadium etc.
Bauxite
Gold