| A | B |
|---|
| mineral | naturally occuring, inorganic solid that has a crystal structure and a definite chemical composition |
| inorganic | not made of materials that were once part of a living thing |
| crystal | a solid whose atoms line up in a pattern that repeats over and over again |
| streak | color of a minerals powder |
| luster | how light is reflected from a surface |
| Mohs hardness scale | ranks minerals from hardest to softest |
| cleavage | when a mineral splits easily along a flat surface |
| fracture | when a mineral breaks in an irregular way |
| density | mass per unit of volume |
