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Which mineral is ranked highest on the Mohs scale and very difficult to scratch?

User ITWorker
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Diamond is the mineral ranked highest on the Mohs scale and is very difficult to scratch. It has a hardness of 10 on the Mohs scale, which means it is the hardest mineral and can scratch all other minerals.
User Lua
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Diamond is the hardest known mineral, Mohs’ 10
User DeanWombourne
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