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Metamorphic rock set includes 8 sets of 7 specimens each (which measure approximately 2-inches by 1-1/2-inches) for a total classroom set of 56 individual rocks!! Includes quartzite, chlorite schist, amphibolite, slate, gneiss, marble, phyllite and garnet schist. Warning: Chocking Hazard - Small Parts. Not for children under 3 years.