It's pretty freakin hard!
the mineral that has a hardness of 7 is "Quarts
Mineral hardness is measured by how resistant one mineral is to being rubbed against another. If the mineral displays clear abrasion then it has low hardness whereas if it displays little abrasion it is a hard mineral.
The unknown mineral has a hardness greater than that of apatite (which has a hardness of 5 on the Mohs scale) since it can scratch it. However, it has a hardness less than corundum (which has a hardness of 9) since it can be scratched by it. Therefore, we can conclude that the hardness of the unknown mineral is between 5 and 9 on the Mohs scale.
The mineral that is softer than apatite is fluorite. On the Mohs scale of mineral hardness, apatite has a hardness of 5, while fluorite has a hardness of 4. This means that fluorite can be scratched by minerals with a hardness greater than 4, including apatite.
If you rubbed a mineral of hardness 7.5 against a piece of quartz, which has a hardness of 7, you would expect the harder mineral to scratch the quartz. The mineral with a hardness of 7.5 would leave a mark or scratch on the quartz surface, demonstrating the principle that harder materials can scratch softer ones. However, quartz would not be able to scratch the harder mineral in this scenario.
It's pretty freakin hard!
The mineral with hardness 3 will get scratched.
the mineral that has a hardness of 7 is "Quarts
The mineral with the greatest hardness is the diamond.
Scratching a mineral with a nail is a test of hardness. It helps determine the relative hardness of the mineral compared to known substances on the Mohs scale of mineral hardness.
Mineral hardness measures the resistance of a mineral to scratching or abrasion. It is determined by the ability of a mineral to scratch another mineral or be scratched by it, as defined by the Mohs scale of hardness.
the mineral that has a hardness of 7 is "Quarts
Ruby, a variety of the mineral corundum, has a hardness of 9 on the Mohs scale of mineral hardness.
Hardness is the measure of how easily a mineral is scratched.
If a fingernail can scratch a mineral, you are testing the mineral's hardness. Hardness is a measure of a mineral's resistance to being scratched by other materials. Minerals are ranked on the Mohs scale of hardness from 1 (softest) to 10 (hardest).
The relative hardness of a mineral can be best tested by conducting a scratch test against common minerals with known hardness values, such as the Mohs Scale of Hardness. By observing which mineral scratches another, you can determine the relative hardness of the unknown mineral.
Orthoclase feldspar is 6 on the Mohs scale of mineral hardness.