Black color in a diamond is most commonly caused by what?

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Multiple Choice

Black color in a diamond is most commonly caused by what?

Explanation:
Black color in a diamond is most commonly caused by numerous dark inclusions scattered throughout the crystal. These internal features—such as dark mineral or graphite-like inclusions—absorb and scatter light, giving the stone a black, opaque appearance even when the rest of the crystal would otherwise be clear. Nitrogen impurities cause yellow to brown tones, not black. Boron impurities can produce blue colors in some diamonds, and surface scratches affect only the surface finish, not the intrinsic color. So the presence of many internal inclusions best explains the black coloration.

Black color in a diamond is most commonly caused by numerous dark inclusions scattered throughout the crystal. These internal features—such as dark mineral or graphite-like inclusions—absorb and scatter light, giving the stone a black, opaque appearance even when the rest of the crystal would otherwise be clear. Nitrogen impurities cause yellow to brown tones, not black. Boron impurities can produce blue colors in some diamonds, and surface scratches affect only the surface finish, not the intrinsic color. So the presence of many internal inclusions best explains the black coloration.

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