Why is the diamond called "King of Gems"?

diamond

Diamond is a crystalline mineral formed by a single carbon (C) element crystallized in a special environment, and is the only gemstone product composed of single elements. Gem-quality diamond (ie diamond) not only has high hardness (10 grade Mohs hardness), it has high anti-wear ability and chemical stability; it has strong gloss, is not easy to wear after processing, and can shine the diamond luster for a long time; and because of its refractive index Large (2.42), strong dispersion (0.044, the strongest among natural colorless gemstones), when the diamond is honed into dozens of facets, the white light that is injected into the diamond is dispersed during the refraction process. It is a monochromatic light, showing seven-color neon-like brilliance, showing the brilliant and crystal-like optical effects. This strong dispersion phenomenon is the most precious feature of diamonds, which is beyond the reach of any other treasures and jade. Therefore, it is known as the "king of gems".

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