- There are about 4,700 known minerals on the Earth.
- Gold and Diamond are the most expensive minerals in the world.
- Minerals are mined from the ground.
- All rocks are made of two or more minerals, but minerals are not made of rocks
- A mineral is solid chemical substance that occurs naturally.
- Minerals measured on Mohs scale, going from 1 (talc, very soft) to 10 (diamond, very hard).
- China is the largest global producer of minerals.