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What can calcite scratch?
Hardness
| mineral | Mohs hardness | observations on the minerals |
|---|---|---|
| gypsum | 2 | can be scratched by the fingernail |
| calcite | 3 | very easily scratched with a knife and just scratched with a copper coin |
| fluorite | 4 | very easily scratched with a knife but not as easily as calcite |
| apatite | 5 | scratched with a knife with difficulty |
What minerals could talc scratch?
According to the scale, Talc is the softest: it can be scratched by all other materials. Gypsum is harder: it can scratch talc but not calcite, which is even harder.
What mineral Cannot be scratched by calcite?
Mineral Hardness Test Video
| Mineral | Hardness |
|---|---|
| Calcite | |
| INTERMEDIATE Mineral cannot be scratched with a fingernail but can be scratched with a steel nail. | |
| Gypsum | |
| SOFT Mineral can be scratched with a fingernail |
Does talc scratch easily?
Talc is known for being the softest mineral on earth. It is number 1 on the Mohs hardness scale, and can be easily scratched by a fingernail.
What are two objects that will scratch fluorite?
Since Fluorite is a 4 on the scale it means that fluorite can scratch all the minerals below it but not be scratched by them. Also if a penny can scratch a mineral it rates a 3, a fingernail is 2.5, knife blade 5.5, glass 5.5 and steel file 6.5.
Can apatite can scratch calcite?
Quartz is a 7. It can be scratched by topaz, corundum, and diamond. Quartz will scratch minerals that have a lower number on the scale. Fluorite is one….Mohs Hardness Scale.
| Hardness | Mineral |
|---|---|
| 2 | Gypsum |
| 3 | Calcite |
| 4 | Fluorite |
| 5 | Apatite |
Can minerals scratch themselves?
A minerals rating on the hardness scale is determined by a scratch test. For example the diamond is the hardest mineral because no other mineral on the scale is able to scratch it. Since Fluorite is a 4 on the scale it means that fluorite can scratch all the minerals below it but not be scratched by them.
Can calcite scratch glass?
With a hardness of 3, calcite is softer than glass (5.5), so it does not leave a scratch.