Freshwater pearls are a beautiful and popular type of pearl that are produced by freshwater mollusks. They are different from saltwater pearls as they are formed in lakes, rivers, and other freshwater sources instead of the ocean.

In this article, we will explore everything you need to know about freshwater pearls, including their formation, colours, sizes, shapes, and types.

Formation of Freshwater Pearls

Freshwater pearls are formed when a freshwater mollusk produces a pearl sac in response to an irritant, such as a piece of sand or a parasite. The mollusk then secretes nacre, which coats the irritant and forms a pearl.

Unlike saltwater pearls, freshwater pearls are usually formed in irregular shapes, making each pearl unique. They can take anywhere from six months to several years to form, depending on the size and shape of the pearl.

Colours of Freshwater Pearls

Freshwater pearls come in a wide variety of colours, ranging from white and cream to pink, lavender, and even black. The colour of the pearl is determined by the type of mollusk that produced it, as well as the water quality and environmental factors.

Sizes and Shapes of Freshwater Pearls

Freshwater pearls come in a range of sizes, from tiny seed pearls to large, baroque pearls. The most common size is around 7-8mm, but they can range anywhere from 2mm to 16mm.

As mentioned earlier, freshwater pearls are usually irregular in shape, which makes them unique and adds to their charm. Some common shapes include round, oval, teardrop, button, and baroque.

Types of Freshwater Pearls

There are several different types of freshwater pearls, each with their own unique characteristics.

  1. Biwa Pearls - Biwa pearls are named after Lake Biwa in Japan, where they were first produced. They are known for their unique shapes and colours, which can range from white to purple and even metallic.

  2. Kasumi Pearls - Kasumi pearls are produced in Lake Kasumi-ga-ura in Japan. They are known for their soft, iridescent colours and unique surface textures.

  3. Edison Pearls - Edison pearls are a relatively new type of freshwater pearl, first produced in China in 2010. They are known for their large size, high luster, and unique metallic colours.

  4. Triangle Pearls - Triangle pearls are named for their unique triangle shape. They are produced in China and are known for their bright colours and high luster.


Freshwater pearls are a beautiful and unique type of pearl that come in a variety of shapes, sizes, and colours. Whether you're looking for a classic white pearl necklace or a statement piece in a bold colour, freshwater pearls are a great choice.

We hope this guide has been helpful in understanding the formation, colours, sizes, shapes, and types of freshwater pearls. By following our tips and suggestions, you can create high-quality content that outranks other websites and attracts more visitors to your site.

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