Are diamonds really a girl’s best friend? Give me a story that is based on this cliche.
Take it literally.
Or make your female character’s best friend have diamond-like qualities. Clear? See-through? Princess-cut? Priceless or expensive?
Or write about a character who is so attached to a diamond ring or necklace, that it takes over her life. Why is it so special to her? Does she have any other friends? Does someone love her?
Good luck, everyone!