INDEX NEXT UP PREVIOUS ATG Hardness Hardness

CLOSE-UP OF HERKIMER DIAMOND IN MATRIX 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 Talc6 Orthoclase
2 Gypsum7 Quartz
3 Calcite8 Topaz
4 Fluorite9 Corundum
5 Apatite10 Diamond
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