| A | B |
|---|
| mineral | naturally occurring, inorganic solid that has a definite shape and makeup |
| inorganic | not formed from living things or their remains |
| crystal | solid in which the atoms are arranged in a definite, repeating pattern |
| luster | way in which a mineral refelcts light from its surface |
| hardness | ability of a mineral to resist being scratched |
| streak | color of the powder left by a mineral when it is rubbed |
| density | mass per unit volume of a substance |
| cleavage | tendency of a mineral to break along smooth surfaces |
| fracture | tendency of a mineral to break along a rough or jagged surface |
| gemstone | hard, beautiful durable substance that can be cut for jewelry |
