This Collection contains 20 Types of Basic Rocks Specimens of Igneous, Sedimentary & Metamorphic Rocks Types & Minerals. (10 Rocks + 10 Minerals) in a Wooden Box. These Rocks & Minerals Collections are used for Practical Knowledge of Rocks Specimens & Minerals Specimens. A great collection to begin your study of sedimentary, metamorphic, and igneous rocks. Twenty representative specimens of the rock types are most often included in geology textbooks. Each specimen measures approx Two-inch in diameter.
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