| A | B |
|---|
| Mineral | Naturally occurring, inorganic solid with a definite chemical composition |
| Crystal | A solid in which the atoms are arranged in orderly, repeating patterns. |
| Magma | Hot melted rock below the Earth's surface |
| Silicates | Minerals that contain silicates and oxygen |
| Hardness | Measure of how easily a mineral can be scratched |
| Luster | The way a mineral reflects light |
| Specific Gravity | The ratio of a minerals weight compared to the weight of an equal volume of water |
| Streak | The color of a mineral in powdered form |
| Cleavage | Minerals that break along smooth, flat surfaces |
| Fracture | Miinerals that break with uneven, rough, or jagged surfaces |
| Gems | Rare and beautiful minerals |
| Ore | A mineral or rock that contains a useful substance that can be mined at a profit |
