In this museum, lithographs from the 19th century are on display.

My mother underwent surgery for gallstones.

He is drawing a picture on a slate.

A beautiful gemstone was embedded in her ring.

This building is made of marble.

He started a fire using a flint.

Amphibole, a type of mineral, is mainly found in igneous rocks.

There are many beautiful stalagmites in this cave.

He cut the dam and started to let the water flow.

She spun cotton to make thread.