Minerals Question
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Use the chart to answer the questions about mineral hardness.
| Mohs Hardness Scale | |||||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| Talc | Gypsum | Calcite | Fluorite | Apatite | Orthoclase | Quartz | Topaz | Corundum | Diamond |
An unidentified mineral can be scratched by orthoclase, but not by calcite. Which of the following best describes the mineral's hardness?
- less than 3
- more than 7
- less than 7 and more than 6
- more than 3 and less than 6