Stone Name

Hardness

(MOH)

Weight

(kg/l)

Compressive Strength

(kg/qcm)

Strokes Until Destruction

Dense limestone

4?

2.65-2.85

800-1800

8-10

Porous limestone

1.7-2.6

200-900

--

Calcareous sandstone

Nubian sandstone

-8

2.0-2.65

300-1800

5-10

Quartzite

6-8

2.6-2.8

1200-2000

8-10

Alabaster (calcite)

2-3

2.7

Granite

6-8

2.6-3.2

1600-2400

10-12

Aswan granite

2.679

Syenite

2.6-2.8

Diorite

5-6

2.75-2.87

1700-3000

10-15

Basalt

6-8

2.8-3.3

2500-4000

12-17

Dolerite

2.93-3.05