Pearlsarenatural pearlsandcultured pearlsof the points,there arewatercultured pearlsand freshwaterpearlbeadsdivided.Naturalpearl productionlessexpensive; andlarge quantities ofcultured pearlscan beoutput,so the priceis much lower.The main differencebetween the twois thatnatural pearlsandcultured pearlsthere is nonucleus.Naturalpearlsare oftenjust somesandcoresor parasitesand other objects, not evennuclear.Thekernelis thecultured pearlproducedartificiallylargebeads, so thethin layeroutside of thepackage.The performance ofthe body surface,natural pearlsbecause of itsgrowth environmentis random,the nuclearfewforeign bodyroll,poorroundnessof itsshape.Roundedcorecultured pearl, sogoodroundnessafterbeads.A long timebecause of the growthof natural pearls, thedelicate textureafterbeads,beadlayerthick,smoothskin,very few"convexbubble", andmoretransparent.Whencultured pearlbeadsdue tothe shortsound, whichbeadthin,roughtexture, lusterwith the"wax"shape, andconcave and convexsurfacesoften have some"smallbubble", transparencyis alsopoor.If thepearlhas beenperforatedwith amagnifying glass tocarefully observe thehole, and if socultured pearls,beadsingeneralcan seethere is abrownline, which isgrowingintothekernel andthenout ofthe dividing linebetween thenacre.
