Mohs' Scale of Hardness

?
What reference mineral is a hardness 3?
Calcite
1 of 22
Which reference mineral(s) can only just be scratched by a steel nail?
Feldspar
2 of 22
What hardness is Fluorite
4
3 of 22
What scratches Calcite?
2p coin
4 of 22
What reference mineral is hardness 9
Corundum
5 of 22
What is the softest reference mineral (hardness 1)?
Talc
6 of 22
Which reference mineral(s) can be scratched by a fingernail?
Talc, Gypsum
7 of 22
Which reference mineral is hardness 10?
Diamond
8 of 22
What scratches hardness 7+ reference minerals?
Nothing, they scratch glass
9 of 22
What reference mineral is hardness 5
Apatite
10 of 22
Which is harder Topaz or Quartz
Topaz
11 of 22
Which reference mineral is easily scratched by a steel nail Fluorite or Apatite?
Both
12 of 22
What scratches Calcite?
2p coin
13 of 22
What scratches hardness 6?
Steel nail, but only just
14 of 22
Put Apatite, Calcite and Fluorite in order of decreasing hardness
Apatite, Fluorite, Calcite
15 of 22
What hardness is Quartz?
7
16 of 22
What scratches Corundum
Nothing, it scratches glass
17 of 22
What reference mineral is hardness 4?
Fluorite
18 of 22
What hardness is Topaz?
8
19 of 22
What reference mineral is hardness 2?
Gypsum
20 of 22
Which is softer Talc or Quartz?
Talc
21 of 22
What reference mineral is hardness 9?
Corundum
22 of 22

Other cards in this set

Card 2

Front

Which reference mineral(s) can only just be scratched by a steel nail?

Back

Feldspar

Card 3

Front

What hardness is Fluorite

Back

Preview of the front of card 3

Card 4

Front

What scratches Calcite?

Back

Preview of the front of card 4

Card 5

Front

What reference mineral is hardness 9

Back

Preview of the front of card 5
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