Similar to colored stones, the majority of pearls never reach perfection. Certain ones may display abrasions resembling a series of surface scratches. Others might have a flattened area that does not impact their overall shape or an irregular ridge resembling a crease or wrinkle.
Surface characteristics, if numerous or severe, can impact the pearl's durability and significantly reduce its value. However, if they are few in number or minor enough to be concealed by a drill-hole or mounting, their impact on the pearl's beauty and value is reduced.
External Link:
https://www.gia.edu/pearl-quality-factor
