This kit contains 105 specimens packaged in 9 separate units to correspond with the following subjects: cleavage and fracture, streak, color and luster, rock forming minerals, basic igneous, sedimentary and metamorphic rocks, and selected fossils. Also includes 9 specimens of the scale of hardness, streak plate, magnet, magnifier, full color geologic time chart and the Rocks and Minerals Study Guide. Geology is a required STEM subject.