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Mineral Hardness Facts
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HARDNESS SCALE
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INDEX MINERAL
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COMMON OBJECTS
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1
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Talc
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| |
2
|
Gypsum
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Fingernail
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3
|
Calcite
|
| |
4
|
Fluorite
|
Copper Penny
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5
|
Apatite
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| |
6
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Orthoclase
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7
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Quartz
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Glass
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8
|
Topaz
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| |
9
|
Corundum
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10
|
Diamond
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