[QUOTE=Zeide Erskine]Hi Goldenpearl,
Valuing natural pearls requires to first rate the luster factors (orient, mirror, and water in this order), then size (typically in carats now, previously in grains), followed by surface perfection and then symmetry (perfectly round is so rare that it is never found in strands). Design also figures into the equation since triple strands are highly desirable and hard to match.
Followed this thread with interest. In the above quote you mention a series of quality factors. As a writer specializing in connoisseurship I was intrigued by the term "mirror" could you explain that term? Noticed that you still use the term "water". This is a very old term not used much anymore in The U. S. I would define it as the combination of color and transparency is that the sense in which you are using it?