Her necklace had a beautiful cat's eye stone.

A common noun refers to a noun that does not point to a specific person or thing.

You, what are you doing?

He is working as an ordinary company employee.

A common noun refers to a noun that does not point to a specific person or thing.

He suddenly lost contact.

That person is my friend.

Learning about the culture of specific Asia is very interesting.

It is important for each person to fulfill their role.

His travel story was very interesting.