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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)
They are Janvil. Their site is http://www.janvil.com . They have glass scratch removers for glass scratches and plastic polish
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.
Glass has a hardness of 5.5 Minerals with hardness nearest to that of glass include apatite, which is slightly softer than glass with a hardness of 5.0, and orthoclase, which is slightly harder than glass with a hardness of 6.0.
scratch it against glass if the glass scratches its diamond
6.0
Between 3.5 and 5.5 on the Mohs scale of mineral hardness.
The hardness of glass is around 6, and the hardness of iron is about 5. So your mineral is probably around a 5.5.
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)
It would have to be 5.0 because glass has a hardness of 5.5 and an iron nail has the hardness of 4.5
No. The hardness of serpentine is 3-4.5, whereas a hardness of at least 7 is needed to scratch glass.
It would have to be 5.0 because glass has a hardness of 5.5 and an iron nail has the hardness of 4.5
The unknown mineral is not a mineral, or the pieces being scratched or doing the scratching are not freshly fractured or cleaved surfaces.
It would have to be 5.0 because glass has a hardness of 5.5 and an iron nail has the hardness of 4.5
scratching the mineral acrros a glass plate
The hardness would be between 4.5 and 5.5 on the Mohs scale. I actually think it would be 4.5, but to be safe, I would put between 4.5 and 5.5. Hope that helps!
The hardness would be between 4.5 and 5.5 on the Mohs scale. I actually think it would be 4.5, but to be safe, I would put between 4.5 and 5.5. Hope that helps!