This rock is mainly composed of anorthite.

This rock has existed for millions of years.

Feldspar is one of the main minerals that make up the earth's crust.

Is it possible to change the configuration of this computer?

It took him a year to compose that song.

He mainly eats vegetables.

A gray cat is walking in the garden.

After the fire, the inside of the house was covered in ash.

The ash blown out from the volcano covered the town.

I make soap using lye.