| A | B |
|---|
| Mineral | a naturally occurring inorganic solid substance with definite physical & chemical properties |
| Cleavage | mineral breaking with smooth surfaces |
| Crystal | solid with an atomic pattern that repeats over and over |
| Fracture | mineral surfaces break unevenly |
| Hardness | resistance to being scratched |
| Luster | the way a mineral reflects light: metallic, glassy, shiny, dull |
| Silicates | 90% of Earth's minerals; compounds of silica and oxygen |
| Rock | a group of minerals bound together |
