An introduction to pearl quality factors
To date there is no internationally accepted or standardised grading system for pearls as we know it for example from the 4C’s in the diamond industry. However, there is a common understanding of the key criteria to evaluate the quality of pearls. These encompass: size, shape, colour, lustre, surface and for cultured pearls also the nacre thickness.
The interplay and balance between these factors in a pearl as well as the type of pearl, define their quality and ultimately their value.