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Mohs Hardness Scale

| Scale Number | Mineral Name | Common Object |
|--------------|--------------|-----------------------|
| 10 | Diamond | |
| 9 | Corundum | |
| 8 | Topaz | |
| 7 | Quartz | |
| 6 | Orthoclase | Steel Nail (6.5) |
| 5 | Apatite | Knife/Glass Plate (5.5)|
| 4 | Fluorite | |
| 3 | Calcite | Copper Penny (3.5) |
| 2 | Gypsum | Fingernail (2.5) |
| 1 | Talc | |

Based on the Mohs Hardness Scale, which mineral could be scratched by a penny but not by a fingernail?

A. Calcite
B. Gypsum
C. Talc
D. Fluorite



Answer :

GinnyAnswer

Final answer:

Calcite could be scratched by a penny but not by a fingernail based on the Mohs Hardness Scale.


Explanation:

Calcite could be scratched by a penny but not by a fingernail based on the Mohs Hardness Scale. Calcite has a hardness of 3, which is higher than gypsum (2) but lower than a penny (3.5).


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