Cultured pearls can be classified into seawater and freshwater varieties. Seawater pearls generally take about 3 years to form, while freshwater pearls take 1 to 2 years. Seawater pearls grow more slowly due to the lower water temperatures, whereas the higher temperatures in freshwater environments promote faster growth.
Typically, a seawater pearl oyster produces only one pearl, whereas a freshwater oyster can yield around 20 pearls, making freshwater pearls more cost-effective.
In terms of appearance and shape, freshwater pearls come in a range of shapes from round to baroque and are available in vivid colors like white, purple, and orange. Seawater pearls are usually rounder and larger, though they also come in various shapes. The following article will delve into the four major types of cultured pearls, including three seawater and one freshwater variety.
Image Source: shepearl.com