| A | B |
|---|
| streak | this color property does not vary |
| luster | this can be either metallic or nonmetallic |
| mohs' scale | used to measure the hardenss of a mineral |
| mineral | has a five part definition |
| cleavage | when a mineral breaks along a flat plane |
| fracture | when the mineral breaks and leaves a jagged plane |
| gem | rare and beautiful minerals that are cut and polished |
| ores | a mineral that contains usable amounts of a metal |
| specific gravity | same amount as density, but without the units |
| conchoidal fracture | when mineral breaks and leaves a curved surface |
