What is the type/origin/species are my 10mm white pearl earrings?

by Macy Jones
(Indianapolis,IN)

Hello!

I feel I have read and read about types of pearls, what makes them different etc. but I am still unsure how much mine are worth and if they are Natural or Cultured?? I know that they are saltwater, they are white and very lustrous. They are round earrings and the jewelry box is from Siri Pearls World in India? They were a gift years ago! I'm thinking Akoya or South Sea, but you're the expert opinion I need! :)

Thanks!
Macy J.