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Carved Stone

1. Diamonds are the hardest natural material on Earth. Only another diamond can scratch a diamond. 2. Formed under extreme pressure and heat. They originate 100–200 km underground in the Earth’s mantle. 3. A diamond takes 1–3 billion years to form. Some are older than many continents. 4. They are made of just one element: carbon. But arranged in a crystal lattice so strong it becomes nearly indestructible. 5. Diamonds can be found in meteorites. Some are literally from space — called carbonado diamonds.