which is the hardest non metal on the earth ???
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ᴛᴜɴɢꜱᴛᴇɴ ɪꜱ ᴛʜᴇ ʜᴀʀᴅᴇꜱᴛ ᴍᴇᴛᴀʟ ᴏɴ ᴇᴀʀᴛʜ
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Diamond is the hardest natural substance on Earth, but it is also very brittle and will shatter if hit with a hammer. Graphite is unusual because it is a non-metal that conducts electricity....
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