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Ideal cut
Generally used to describe a round brilliant cut that is cut to perfect proportions and symmetry.

Inclusion
A natural imperfection in a diamond which affects the clarity grade of the stone. Examples of inclusions found in diamonds are feathers, crystals, needles, clouds and pinpoints.

Internal graining
Indications of irregular crystal growth within a diamond or gemstone. These may appear milky, similar to faint lines or streaks, or may have colour or be reflective.

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