The Hardness of a mineral refers to its ability to resist scratching.
A special scale called Mohs' Scale of Hardness is used as a measure for determining Hardness.
This scale consists of ten specific Minerals, each given a number from 1 to 10 where 1 is the softest and 10 is the hardest.
These ten Minerals and their Hardnesses are:
|1 Talc||6 Orthoclase|
|2 Gypsum||7 Quartz|
|3 Calcite||8 Topaz|
|4 Fluorite||9 Corundum|
|5 Apatite||10 Diamond|
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