All Pearls today are 'cultured'. The culturing process started in the 1920's and has made Pearl affordable worldwide. Prior to this Pearls have been the exclusive domain of royalty and throughout recorded history only the wealthiest have been able to afford them!
Today, thanks to the Pearl culturing industry Pearls are very affordable and "Pure Pearls" often present absolutely perfect lustre, shape and colour in a very affordable price range.
A "Pure Pearl" ring is exactly that; a "solid" Pearl, "Pure" as there are no internal beads, seeds, granite or plastic internal elements. This is a wonderful development in the Pearl culturing industry and has come about as a result of using mantle tissue to start the nacreation process. All alternate culturing processes require the insertion of Pearl beads as "seeds" these beads can actually be quite large leaving a very minimal layer of nacre on the final Pearl. "Pure" Pearls are the opposite as they are 100% Pearl and very affordable.