A beautiful set of 12 rocks with matching 3 part cards. The rocks range in size from 1  to 5 inches. There are 4 each of sedimentary, Igneous, and metamorphic rocks. Each matching card features the rock photo and name. On the back side there is a photo taken where the rock might be found and a very interesting paragraph about how the rock was formed and might be used. Name cards for matching and cards about the 3 types of rocks are included. This material is perfect for home and in both primary and elementary Montessori classrooms. The price includes a 5 dollar shipping surcharge.