Words of This Topic
| Word | Meaning |
| Mineral | A pure, solid substance that occurs naturally |
| Crust | The outermost shell of the Earth |
| Geology | The science that studies the make-up of the Earth |
| Mineralogy | The branch of Geology that studies minerals |
| Ore | A mineral holding a metal, from which the metal is taken out |
| Ferrous minerals | Ores holding a large amount of iron |
| Non-ferrous minerals | Ores with no iron, or very little |
| Precious minerals | Ores found in small amounts but of great economic value |
| Gems | Precious non-metallic minerals that are set into jewellery |
| Crystal | A form with a definite geometrical shape |
| Amorphous | A form without a definite crystal shape |
| Homogenous solid | A solid with the same chemical composition all the way through |
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