+Diamonds are a [Solid](/wiki/Solid) crystalline form of carbon, renowned for their exceptional hardness and optical properties. They are the hardest known [Mineral](/wiki/Mineral), cherished as gemstones and used in industrial applications.
+## See also
+- [Carbon](/wiki/Carbon)
+- [Gemstone](/wiki/Gemstone)
+- [Jewelry](/wiki/Jewelry)
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