Between 1 and 3, depending on it's structure and density. Quite soft.
Nickel has a hardness of 4 on the Mohs scale.
Coal, as an organic sedimentary rock, is not determined to have a hardness on the Mohs scale of mineral hardness.
The Mohs hardness scale rating for brass is around 3 to 4.
Stainless steel has a hardness level of around 5.5 on the Mohs scale.
Sulfur is a relatively soft mineral, with a hardness of 2 on the Mohs scale. It can be scratched by minerals with a higher hardness, such as calcite (3 on the Mohs scale) and fluorite (4 on the Mohs scale).
The Mohs hardness of sodium chloride is 2,5.
The hardness of sodium chloride on the Mohs scale is 2,5.
The hardness of sodium chloride on the Mohs scale is 2,5.
Sodium Chloride IS hard, just brittle, that's why it breaks apart in your hands. The hardness of sodium chloride is 2,5 on the Mohs scale.
Diatomite has a hardness of around 5.5 on the Mohs scale of hardness.
It's called the Ore
The hardness of Limonite is 4 t0 5.5 on the mohs hardness scale.
Azurite has a hardness of 3.5 to 4 on the Mohs hardness scale.
flint is a type of quartz, so it has a hardness of about 7 on the mohs scale of hardness
Nickel has a hardness of 4 on the Mohs scale.
The hardness is 3-4 on Mohs scale.
Sodium has a Mohs hardness of around 0.5, which means it is very soft and easily scratched by harder materials.