Our most popular rock and mineral collection! Forty top-quality rock and mineral specimens are provided. Rock-forming minerals, ores of common metals and non-metals, sedimentary, igneous and metamorphic rocks are all represented. Specimens are approximately 2" x 1-1/2" and packaged in a compartmentalized collection box with study guide and key. A matching set of test chips is available. The chips are unlabeled, smaller in size-perfect for student testing and identification.