A diamond.
Actually, a diamond can be scratched my other minerals.
Minerals are tested for hardness by performing a scratch test. The unknown mineral is scratched with another object that the hardness is known. For example, a unknown mineral may be scratched with a piece of metal to compare the resistance.
Gypsum
not diamond
A mineral's resistance to being scratched (or when a force is applied) is called its hardness.There are different measurements of hardness: scratch hardness, indentation hardness, and rebound hardness. A material's hardness depends on ductility, elastic stiffness, plasticity, strain, strength, toughness, viscoelasticity, and viscosity.
Hardness is the measure of how easily a mineral can be scratched.
Corundum- which can only be scratched by diamond. Diamond cannot be scratched by any other mineral.
A diamond is the hardest mineral. A diamond can scratch all other minerals or rocks and cannot be scratched by another mineral or rock except another diamond.
No. A diamond can still be scratched by another diamond.
A diamond is the only material that cannot be scratched by any other than itself.
Pyrite
Talc is the softest mineral and can be scratched by any other mineral.
the softer mineral can be scratched by a harder mineral. Ex: talc is 1 and quartz is 7 so quartz can scratch talc
Minerals are tested for hardness by performing a scratch test. The unknown mineral is scratched with another object that the hardness is known. For example, a unknown mineral may be scratched with a piece of metal to compare the resistance.
Dolomite. I think.
There is none because diamond is at the top of the scale so it can scratch anything.
potassium feldspar
Diamond are only scratched by diamonds.