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Diamond is the hardest natural substance on earth

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Diamonds are thought to be one of the hardest natural materials known to man; according to researchers, a diamond is up to 58 times harder than anything found in nature. As a result, the only object or piece of equipment capable of cutting through a diamond would be another diamond.

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Quebec City was established in 1608.

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By sowing this unusual plant, the soil's physio-chemical characteristics are altered, increasing the levels of nitrogen and potassium.