| A | B |
|---|
| mineral | naturally occuring inorganic solid with a definite chemical composition |
| crystal | solid where the atoms are arranged in orderly repeating patterns |
| magma | melted rock--below earth's surface |
| silicates | minerals that contain silicon and oxygen |
| hardness | measure of how easily a mineral can be scratched |
| moh's scale | used to determine a minerals hardness |
| luster | way a mineral reflects light |
| specific gravity | minerals weight compared with equal amount of water |
| streak | color of mineral in its powdered form |
| cleavage | way a mineral breaks along smooth flat surfaces |
| fracture | minerals that break with uneven rough jagged edges |
| gems | highly prized minerals |
| ore | mineral that contains a useful substance that is mined for a profit |
