In recent years, however, pen pearls have become much more sought after as farmers, particularly in Indonesia, have learned to use them as nuclei for a new kind of atypical cultured pearl (Hainschwang ...
Natural-color saltwater cultured pearls from Pinctada margaritifera were studied by diffuse reflectance UV-Vis-NIR spectroscopy to identify the absorption features associated with their various colors ...
Pearls are rare gems formed inside oysters and mussels. Found in oceans and rivers, they can be natural or cultured. Tap to read more. Mollusks like oysters and mussels, which live in both ...