| A | B |
|---|
| A solid element or compound from the Earth's crust that has a definite chemical composition and crystal shape | mineral |
| The way light reflects from the surface of a mineral | luster |
| A measure of how easily a mineral can be scratched | hardness |
| The colored powder made by rubbing a mineral against a ceramic surface | streak |
| The tendancy of some minerals to split along flat surfaces | cleavage |
| The hardest mineral | diamond |
| Diamonds are made of | pure carbon |
| The softest mineral | talc |
| Fool's gold | pyrite |
| A mineral that cleaves along one plane and peels in thin sheets | mica |
