Question

Which of the following is a type of mineral

1. coal
2. concrete
3. steel
4.quartz

Answer 1

4. quartz

Step-by-step explanation:

A mineral is a naturally occurring, inorganic substance that has a crystalline structure. Both concrete and steel are not naturally occurring. They are man-made. Additionally, while coal is naturally occurring, it is a rock, and therefore does not have the needed crystalline structure.