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From the glassy texture of obsidian to the distinct layers of mica, our collections let students explore the properties of rocks, fossils and minerals--firsthand! Each of our collections includes 15 easy-to-handle specimens--all labeled for easy identification. The complete set includes all 5 collections listed at right, each with a teacher's guide and a compartmentalized box for easy display and storage. The largest rocks measure a big 2-1/2".
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