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What rocks can scratch mirrors/glass?

April 26, 2017earth Geology glass Mathematics mirrors rocks sciences scratch

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What rocks can scratch mirrors/glass?

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Many Minerals and rocks can scratch glass.to have an idea compare the hardness on the hardness scale, glass nearly as glass hardness MOHS’ HARDNESS SCALE Hardness Scale Mineral Hardness Test 1. Talc Talc is the softest mineral and can be scratched by your fingernail. 2. Gypsum 3. Calcite Calcite can be scratched with a copper coin. 4. Fluorite Fluorite can be scratched by a knife blade or window glass. 5. Apatite 6. Orthoclase feldspar Feldspar scratches a knife blade or window glass. 7. Quartz 8. Topaze 9. Corundum 10. Diamond Diamond is the hardest known mineral and scratches all known materials.