| A | B |
|---|
| minerals | naturally occuring, inorganic solids at room temperature with defined chemical composition and crystalline structure |
| rocks | naturally occuring solids at room temperature made up of minerals |
| diamonds | hardness of 10, formed in Earth's mantle |
| Mohs Hardness scale | typically ranges from 1-10 and used to identify minerals |
| Streak | the colour observed when a mineral is scratched onto a smooth, unglazed porcelain surface |
| fluorescence | light given off by rocks & minerals when electrons are excited by UV light |
| Cleavage | tendancy to break in distinct planes where weak chemical bonding occurs. |
| Fracture | Tendency to break irregularlly. |
