Is a sedimentary rock or a metamorphic rock harder to sculpt?

Answer 1

Metamorphic rocks are formed from sedimentary and igneous rocks. When sedimentary or igneous rock is subjected to heat and pressure, the rock gets compressed. Therefore, if you had the same amount of metamorphic rock and sedimentary or igneous rock, the metamorphic rock would be heavier, because there is more 'stuff' in the metamorphic rock.

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However please note:

There are types of igneous rocks that are hard (eg granite) and others that are soft (eg volcanic ash).

There are types of metamorphic rocks that are hard (eg gneiss) and others that are soft (eg marble).

Thus "hardness" is not a characteristic that can be used to distinguish between the two.

Answer 2

Rocks are natural earth materials. As such they are very variable. Some metamorphic rocks will be among the strongest of rocks (typically the high grade metamorphic rocks such as gneiss or hornfels). However other types may be significantly weaker, especially those (phyllite or slate for example) that formed from rocks containing significant quantities of clay minerals such as shales as these tend types of metamorphic rocks tend to be highly fissile and so may be considered weak.

Answer 3

Sedimentary rock would be harder to sculpt because it is made from many different layers. A metamorphic rock is one rock so it is easier.

Answer 4

Yes.