| A | B |
|---|
| physical property | any characteristic of a material that you can see without changing the identity of the material |
| hardness | measure of how easily a mineral can be scratched |
| luster | the way a mineral reflects light from its surface |
| specific gravity | ratio of a mineral's weight compared with the weight of an equal volume of water |
| streak | color of a mineral when it is in powdered form |
| cleavage | minerals that break along smooth, flat surfaces |
| fracture | minerals that break with uneven, rough, or jagged surfaces |
| Mohs Scale | list of common minerals to compare their hardness |
