What is the hardest known natural substance?
Diamond is the hardest naturally occurring substance known to man. It is composed of carbon, and is found in igneous rocks and alluvial deposits. Due to its unique crystalline structure, diamonds are extremely hard and have a high resistance to scratching. Diamonds are widely used in jewelry and cutting tools, and are highly valued for their beauty and durability.
The hardness of a material is measured on the Mohs scale, which ranges from 1 to 10. Diamond has a hardness of 10 on the Mohs scale, making it the hardest known natural substance. Other minerals, such as corundum (which includes sapphires and rubies) and topaz, also have high levels of hardness, but they are not as hard as diamond.
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