Pearl Quality Nacre piled up like bricks

The condition of the surface can be one created during the growth of the pearl and one created during the processing.

What can be made during the growth of the pearls can be various of sizes, irregularities, and forms.
It is said that it can be caused by a kind of abnormal secretion caused by the weakness of the shellfish.
Pearls are processed for bleaching and toning, At that time what was created for some reason other than natural method are called processing flaw. Appears as small cracks and spots.
When evaluating the pearls, their presence will lower the rating.