Each time a cultured pearl that has a bead nucleus is X-rayed, it reveals a unique composition to that of the pure pearl (see diagram). A beaded cultured pearl exhibits a solid Middle with no concentric progress rings, whereas a pure pearl demonstrates a number of concentric expansion rings. Etsy https://elliottxdhlq.gynoblog.com/13044420/the-basic-principles-of-pearl-necklaces-richmond-indiana