Set of 2 Navajo Sand Art paining on boards Pictures SIGNED "Rainbow"

Set of 2 Navajo Sand Art paining on boards Pictures SIGNED "Rainbow" The larger one is 12"×12" The smaller is 6" tall x3" wide The bigger one has some very light marks on it. Both were originally wrapped in plastic but I took it off the larger one to get more detailed pics. The smaller one is still packaged. LOOK AT PICS CLOSELY PLEASE!