Hardness levels Flashcards
1
Q
graphite
A
1-2
2
Q
halite
A
2.5
3
Q
biotite
A
2.5
4
Q
calcite
A
3
5
Q
fluorite
A
4
6
Q
hematite
A
5-6
7
Q
manetite
A
5.5-6
8
Q
pyrite
A
6-6.5
9
Q
quartz
A
7
10
Q
fingernail
A
2.5
11
Q
copper
A
2.5
12
Q
glass
A
6.5
