CIBJO Guide For Classifying Natural Pearls And Cultured Pearls

The 62-page illustrated document provides an overarching view of natural and cultured pearls, from both seawater and freshwater sources, and highlights the important parameters by which their appearances can be described and assessed in terms of physical dimensions and quality. It is designed to serve as a reference point and a source of information for both the general public and the jewelry trade.

Useful links: http://www.cibjo.org/wp-content/uploads/2021/02/21-02-17-CIBJO-Pearl-Guide.pdf I http://www.cibjo.org