For example, akoya pearls can only grow about 9 or 10 millimeters ... The shape and surface of the pearl also impacts its value. Typically, the rounder and smoother, the better.

He used Akoya pearls, which are the traditional white round ... the shape and surface of a pearl can have an impact on its value. Typically the rounder and smoother, the better.

Japan's akoya oysters have been preëminent among cultured pearls ever since Kokichi Mikimoto first established the industry in the early part of this century. But since 1994, something has been ...