A mineral that is scratched by apatite (hardness of 5) but not by calcite (hardness of 3) must have a hardness value that is between 3 and 5. Therefore, the only possible hardness value from the options provided is 4.
The answer is: 4
Use the Mohs Hardness Scale chart to answer the question.
A chart titled Mohs Hardness Scale shows minerals of increasing hardness, starting at 1 and increasing to 10. Talc has a hardness of 1. Gypsum has a hardness of 2. Calcite has a hardness of 3. Fluorite has a hardness of 4. Apatite has a hardness of 5. Feldspar has a hardness of 6. Quartz has a hardness of 7.Topaz has a hardness of 8. Corundum has a hardness of 9. Diamond has a hardness of 10.
A mineral is scratched by apatite but not by calcite. What could its hardness value be?
(1 point)
Responses
1
1
2
2
4
4
6
6
Skip to navigation
1 answer
1 answer