No internal characteristics visible under 10X when examined by a trained eye. Stones in this category are free from all inclusions but do posess minor surface blemishes. Noramlly these stones may be made flawless by minor repolishing; exceptions to this general rule would be diamonds that exhibit surface grain lines, which could not be removed by repolishing. Such stones still might be graded IF.
Surface characteristics limited to small extra facets, and naturals that do not break into either crown facets or pavillion facets.
This clarity grade range is also commonly sought after by investors, as it too demands an extremely high price per carat , while producing the highest yield in increased value over the long term.