Rock type

SiO₂

(%)

Specific gravity

Crushability

Los Angeles

Dynamic fragmentation

Abrasi

veness

Basalt

20 - 50

2.7 - 3.1

20 - 44

8 - 21

11 - 32

500 - 2300

Diabase

45 - 55

2.6 - 3.1

18 - 44

7 - 34

11 - 21

450 - 2300

Diorite

55 - 70

2.6 - 2.9

20 - 36

14 - 30

13 - 24

400 - 1700

Dolomite

0 - 10

2.6 - 3.0

30 - 56

15 - 55

20 - 38

20 - 250

Gabbro

40 - 55

2.7 - 3.0

27 - 34

14 - 30

15 - 19

800 - 1700

Gneiss

55/75

2.6 - 2.8

30 - 67

15 - 28

12 - 42

600 - 1600

Granit

65 - 75

2.6 - 2.8

28 - 90

17 - 35

17 - 41

900 - 1900

Limestone

0 - 30

2.4 - 2.8

30 - 45

30 - 45

28 - 44

0 - 500

Quartzite

90 - 99

2.5 - 2.7

22 - 65

17 - 40

14 - 40

1400 - 2400