This is Mohs hardness scale
Which example lists minerals from hardest to softest?
Hardness
apatite, quartz, fluorite, talc
diamond, talc, fluorite, topaz
talc, calcite, orthoclase, diamond
corundum, quartz, calcite, gypsum
✓
4
Mineral
talc
gypsum
calcite
fluorite
apatite
orthoclase
quartz
topaz
corundum
diamond
00
N
10