| A | B |
|---|
| mineral | a naturally occurring, inorganic solid that has a definite chemical composition and a crystal structure |
| crystal | A mineral’s atoms are arranged in a regular, repeating pattern |
| luster | the unique way a mineral reflects light |
| metallic | luster that is shiny |
| nonmetallic | luster that is not shiny |
| hardness | the ability to resist being scratched |
| Mohs Scale | hardness is measured on this |
| streak | the color of the powder of a mineral |
| Cleavage | when a rock breaks along a flat, smooth surface |
| Fracture | when the rocks break along a jagged, rough surface |
| Ore | a naturally occurring, combination of both metals and nonmetals |
| Metals | shiny surfaces, good conductors of heat and electricity, malleable, ductile |
| Nonmetals | dull surfaces, poor conductors of heat and electricity, brittle |
| Gemstones | a mineral that can be cut and polished for jewelry |
