| A | B |
|---|
| Mineral | A naturally occurring, inorganic substance that has a definite chemical composition |
| Cleavage | When a mineral breaks in a PREDICTABLE PATTERN |
| Fracture | When a mineral breaks in a random (uneven, unpredictable) pattern |
| Hardness | A mineral's resistance to being scratched |
| Moh's Scale | A scale that classifies minerals based on their hardness |
| Luster | Reflectionof light (metallic or non-metallic) |
| Streak | The color of the powdered form of a mineral |
| Monomineralic | A rock made from one mineral |
