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Moh's Scale Of Hardness
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| Each material will scratch those with a lower number and
be scratched by those with a higher number. The steps along the scale
are not regular. #2 and #3, for example, are close in hardness while
#10, diamond, is 80 times harder than #9. |
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Moh's Scale Of Hardness
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Moh's Hardness For Studio Materials
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1
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talc
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2.5
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fingernail, fine gold, fine silver, lead
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2
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gypsum
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3
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copper
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3
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calcite
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4
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sterling
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4
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fluorite
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5.5
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window glass
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5
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apatite
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6
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knife blade
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6
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orthoclase
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6.5
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file
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7
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quartz
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9
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silicon carbide (sandpaper)
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8
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topaz
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9
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corundum
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10
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diamond
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