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.

He works at a textile spinning factory.

She spun cotton to make thread.

We need to enhance the security of this system.

This building is made of high-quality building stone.

He studied all night on the eve of the exam.

This candle is made of paraffin.

This beautiful sculpture is made of agalmatolite.