Rock name

gneiss

Alkaline syenite

Nepheline syenite

granodiorite

dolerite

tonalite

peridotites

Density range/ g/cm³

2.60 - 2.90

2.60 - 2.95

2.53 - 2.70

2.67 - 2.79

2.70 - 3.50

2.62 - 2.96

2.78 - 3.37

Mean density value/ g/cm³

2.75

2.78

2.61

2.73

3.10

2.79

3.08