nsTeam1RO, nsTeam1RW, nsTeam1_talkRO, nsTeam1_talkRW
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The '''hardness''' of a [[mineral]] indicates how well it resists scratching and abrasion. It is measured on a numerical scale, from 1 (softest) to 10 (hardest):
# [[Talc]]
# [[Gypsum]]
#[[Calcite]]
#[[Fluorite]]
#[[Apatite]]
#[[Orthoclase Feldspar]]
#[[Quartz]]
#[[Topaz]]
#[[Corundum]]
#[[Diamond]]
Chesterman, p. 27
=Sources=
*Chesterman, Charles W. ''The Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf: New York (1987)
# [[Talc]]
# [[Gypsum]]
#[[Calcite]]
#[[Fluorite]]
#[[Apatite]]
#[[Orthoclase Feldspar]]
#[[Quartz]]
#[[Topaz]]
#[[Corundum]]
#[[Diamond]]
Chesterman, p. 27
=Sources=
*Chesterman, Charles W. ''The Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf: New York (1987)