This rock is jyamongan, in other words, serpentinite.

This building is made of granite.

This mountain is made of igneous rock.

Smoking is considered a cause of carcinogenesis.

This area is rich in pitchstone.

I saw a Canada goose in the park.

Shale is one of the main sources of oil and gas.

This area is rich in shale.

This area is rich in porphyrite.

Her blue eyes are as deep and beautiful as the sea.