puzzles

Dear Puzzler, As we all know, pet rocks have unique personalities and features. What is less known, however, is that a pet rock's unique features lend themselves to a singular, perfect name for him or her. Today is your chance to learn this naming secret. We have included images of three perfectly named pet rocks but have left the fourth for you to discover... You may find this useful as you discover how pet rocks are named: What's the name of the fourth rock?