Defining the clarity of a diamond

Considerations or criterion in grading the clarity of a diamond are the type, size as well as the location of inclusions. For example, inclusions on or near the surface may well weaken the diamond structurally, and hence tend to reduce or lessen its value.
Considerations or criterion in grading the clarity of a diamond are the type, size as well as the location of inclusions. For example, inclusions on or near the surface may well weaken the diamond structurally, and hence tend to reduce or lessen its value.

On other hand, it may be quite possible to hide specific inclusions behind the setting of a diamond. This depends on where the inclusion is, thus minimising any negative practical impact arising out of it. It’s important to keep in mind the fact that a clarity rating is sometimes attained artificially. For example, ‘laser drilling’ involves using a laser for burning a hole to a coloured inclusion - followed by acid washing to wash off the colouring agent.

The clarity grade is the one after the treatment. It’s mostly considered permanent. Grades are issued for laser drilled diamonds. It is expected of vendors to disclose the usage of laser drilling.

Clarity may sometimes be enhanced by filling the fracture much akin to a car windshield crack treatment. Such diamonds are often termed ‘fracture filled diamonds’. This filling is also supposed to be disclosed. Reputable filling firms make use of filling agents that show a flash of colour, usually pink or orange, when observed closely. There’s a significant price discount for fracture-filled diamonds.

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