Vascular X Canada A special cleaning solution (actually boiling acid!) might be needed in order to bleach out the dark inclusion so that after the treatment, it will then be a light colored inclusion against a bright background. The laser drill holes that are now in the diamond are extremely small and you will need high magnification in order to see them. Because of the reduced contrast between the now lightly colored inclusion and its background, the clarity grade of this clarity enhanced diamond will be improved. The newly clarity enhanced diamond will many times be "eye clean"  

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