Pet Markers PET MARKERS CAN BE MADE WITH GRANITE, SANDSTONE, AND LIMESTONE. PET MARKERS START AT ABOUT $60. PET MARKER #1 PET MARKER #2 PET MARKER #3 PET MARKER #4 PET MARKER #5 PET MARKER #6 PET MARKER #7 PET MARKER #8 PET MARKER #9 PET MARKER #10