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Ward's Science Essentials® Talc
Talc is the softest know mineral with a moh's hardness of 1, and composed of clay.
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Ward's Science Essentials® Scoria
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Scoria is a dark-colored rock formed from lava with a high gas content.
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Ward's Science Essentials® Sedimentary Rocks Collection
Introduce your students to rocks formed from deposition of sediment.
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