Why there are colors in the fine cut diamond?

Pure diamond should transmit visible light and appear as a clear colorless crystal. Colors in diamond originate from lattice defects and impurities. The diamond crystal lattice is exceptionally strong and only atoms of nitrogen, boron and hydrogen can be introduced into diamond during the  growth at significant concentrations (up to atomic percents). Nitrogen gives yellowish color while the Boron gives bluish color.

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