"STEM kits"

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Ward's Science Essentials® Limonite

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Earthy, yellow brown iron ore.

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Massive sedimentary gypsum with a moh's hardness 2..

White to gray, medium to coarse-grained, crystalline.

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Kaolin is a white clay mineral that has vast industrial uses

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Hemalite is a Massive, dense red to gray, classic example of iron ore.

Talc is the softest know mineral with a moh's hardness of 1, and composed of clay.

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A textbook example of pure crystalline carbon which is extermely soft.

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