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Which would be the hardness of a mineral that can be scratched by a penny but not a fingernail?
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How hard is a penny?
a penny has a hardness of 3 depending on what it is being scratched on.
How would a mineral collector determine the hardness of an unknown mineral specimen?
There are two ways. One way is to buy a scratch test kit and follow the instructions. They will tell you to try to scratch minerals of certain hardnesses and find the hardest one it can scratch. For example, if it scratches a mineral with a hardness of 6 but not one with a hardness of 7, the hardness would be between 6 and 7. If you do not have one of those available, you can try scratching common objects. Your fingernail is 1.5, a penny is 2.5, a pocketknife blade is 5.0, window glass is 5.5, a steel file is 6.5, and quartz is 7.0.
What common tools are used to test hardness of a rock?
nail, penny, your fingernail, or other rocks
What is the harness of a mineral if it scratches a penny but will not scratch glass?
Google "Mohs hardness scale". This is a relative hardness scale which compares one mineral's hardness to another. (It is between 3.5 and 5.5 on the Mohs hardness scale)
What is a penny on Mohs hardness scale?
About 3
What mineral can be scratched by a penny but not a fingernail?
Calcium
Does the density of a mineral depend on the size of the mineral sample?
No, to tell how hard a mineral is you either have to test it or determine what mineral it is. Testing uses materials of known hardness such as a fingernail, or copper penny, or scratch plate, if the mineral is scratched by whatever you use to test it is softer. Hardness however is not based on size it will be the same for any sample of the same rock no matter what the size because its based on atomic arrangement and bond type.
What property are you testing if you scratch a mineral with a penny a nail and your fingernail?
It relative hardness, compared to others. It is relative because it does not give absolute values.
How hard is a penny?
a penny has a hardness of 3 depending on what it is being scratched on.
What mineral can be scratched by a penny?
nickel
Which mineral can be scratched by glass but not a penny?
A topaz
How would a mineral collector determine the hardness of an unknown mineral specimen?
There are two ways. One way is to buy a scratch test kit and follow the instructions. They will tell you to try to scratch minerals of certain hardnesses and find the hardest one it can scratch. For example, if it scratches a mineral with a hardness of 6 but not one with a hardness of 7, the hardness would be between 6 and 7. If you do not have one of those available, you can try scratching common objects. Your fingernail is 1.5, a penny is 2.5, a pocketknife blade is 5.0, window glass is 5.5, a steel file is 6.5, and quartz is 7.0.
What is the hardness of a mineral if it scratches a penny but will not scratch glass?
Between 3.5 and 5.5 on the Mohs scale of mineral hardness.
What mineral do you scratch with a penny or steel wool for hardness?
Copper and steel have hardness of around 3 and 6 respectively on the Mohs scale. You can use them to test any mineral, and roughly estimate its hardness. If it's scratched by copper, it's less than 3, if it's scratched by steel but not by copper, it's between 3 and 6, if neither copper nor steel scratches it, then it's above 6.
How do classify minerals according to their hardness geoogist use what?
Geologist perform a hardness test using their fingernail, a penny, and a paper clip.
Which mineral could be scratched by a glass but not by a penny?
minearls
What common tools are used to test hardness of a rock?
nail, penny, your fingernail, or other rocks
