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The top documents tagged [ore body slide]
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Hardness Mohs Hardness Scale 1. Talc 2. Gypsum 2.5finger nail 3.5penny 3. Calcite 4. Fluorite 5. Apatite 5.0 nail 5.0-6.0 glass and knife blade
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Silicates SiO n silicon oxide 1/3 of all minerals are silicates about 95% of the Earth’s crust is composed of silicates
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