| A | B |
|---|
| Mineral | naturally occuring, inorganic, solid, whith a definite chemical composition. |
| Crystal | a solid in which the atoms are arranged in orderly repeating patterens. |
| Magma | hot melted rock. |
| Silicates | Minerals that contain Silicon and Oxygen and usually one or more elements. |
| Hardness | A measure of how easily a mineral is scratched. |
| Luster | The way a mineral reflects light. |
| Specific Gravity | is the ratie between its weight and of an equal amount of water. |
| Streak | Color of a mineral in its powdered form. |
| Cleavage | Minerals that break with smooth, flat surfaces. |
| Fracture | Minerals that break with uneven, rough or jagged edges. |
| Gems | rare and beautiful minerals that are polished and shined. |
| Ore | A mineral or rock if it contains a useful substance that can be mined for a profit. |
