There are a lot of pebbles at the bottom of this river.

He picked up a small stone and threw it.

Nepheline is a very important mineral in mineralogy.

Ishizawa is my best friend.

My stepfather is a very kind person.

She bought a new bra.

My dream is to own a yacht in the Mediterranean Sea.

My father is a doctor.

Her necklace had a beautiful cat's eye stone.

A pronoun is a word used in place of a noun.