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"WardsSci000764"
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Ward's Science Essentials® Graphite
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A textbook example of pure crystalline carbon which is extermely soft.
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Ward's Science Essentials® Milky Quartz
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Massive white quartz with a moh's hardness 7.
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Ward's Science Essentials® Phyllite
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Phyllite is a light-gray foliated rock formed from metamorphosed slate.
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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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