He is suffering from deep loneliness.

He was sitting alone in the room, feeling lonely.

This beautiful prehnite necklace is my favorite.

Mr. Sekiguchi is my best friend.

This plan is like killing two birds with one stone, it can save both time and money.

This stone statue was made by ancient artists.

This beautiful zoisite necklace is my favorite.

There is a pomegranate tree planted in the garden.

Coal is a type of fossil fuel.

We must fulfill our responsibilities as a society.