p48cneal/planetearth/lab-mineral-id/lab_1_hand… · a group of crystal faces, related by the...
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HARDNESS: MOH’S Hardness Scale (NOT absolute):Talc 1 The
Gypsum 2 Girls/Guys
Calcite 3 Can
Fluorite 4 Flirt
Apatite 5 And
Orthoclase 6 Other
Quartz 7 Queer
Topaz 8 Things
Corundum 9 Can
Diamond 10 Do
MOH’S Hardness of Common Items:
Fingernail 2 to 2.5
Copper coin 3.5
Steel knife 5 to 6
Glass 5 to 5.5
Streak plate 6.5 to 7