What is the hardest natural substance in the world amazon quiz?

Question: What is the hardest natural substance in the world amazon quiz?

The hardest natural substance in the world is diamond. Diamond is an allotrope of carbon, formed under high heat and pressure inside the Earth. Diamonds are the hardest known naturally occurring material, with a hardness of 10 on the Mohs scale of mineral hardness. This hardness makes diamonds especially resistant to scratching, abrasion, and fracturing. Diamonds are also extremely rare and valuable.

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