| Hi Elizabeth,
You may want to check the many threads on this forum that discuss grading standards or the lack thereof. However, akoyas should not have lines and rarely do because it takes a minimum nacre thickness to develop circlé that akoyas lack. So, while having a circléd pearl means that it has decent or better nacre thickness it also means it is not an akoya. The last akoyas with nacre thick enogh to develop circlé were harvested in the early 1930s.
Zeide |