natural or non beaded cultured pearls?

[deck zero]

View attachment 25678View attachment 25679
I found this necklace at a second hand shop. Individual knotted pearls, gritty tooth test,14 k clasp.
Size ranges 7.8 to 8.8 mm. I decided to look inside one, found really nice concentric rings. Ideas?

 

[GemGeek]

Please try again with the photos. Maybe do one at a time and check the preview before posting.

 

[pearlescence]

Cultured freshwater - and that's without the pix

 

[lisa c]

SmartyPants! ((Wendy))

 

[kiwipaul]

If you scroll down towards bottom of first page in this thread you'll see the concentric rings in a cultured freshwater someone smashed open

https://www.pearl-guide.com/forum/showthread.php?t=8045