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Rocks and Minerals
Term | Definition |
---|---|
luster | The way a mineral shines, or reflects light. |
mineral | A nonliving solid material that has a definite chemical makeup and is found in Earth's outermost layer. |
hardness | A measure of how easily a mineral can be scratched. |
clevage | The tendency of a mineral to split easily along flat surfaces. |
streak | The color of a mineral when it is ground to a powder. |