Showing posts with label Kasumiga pearls. Show all posts
Showing posts with label Kasumiga pearls. Show all posts

Keshi freshwater pearls

Keshi wholesale pearls are flat, irregular and they are formed when a mollusk tries to expel a bead nucleus but continuous to make a pearl. Keshi pearls come in many shapes and sizes but most of the Keshi pearl are flat, dimpled, and are rarely round. Because of the unusual shapes, Keshi pearls are sometimes also called as “cornflake pearls”. They are the most alternative looking pearl because of their distinctive and uneven contours. These pearls reflect the light in mysterious and unique ways and attract attention. A single strand of these exquisitely textured Keshi pearls creates a piece of artwork when strung together.

There are several types of Keshi pearls, Akoya Keshi pearls, south sea, and Tahitian Keshi pearls. Akoya Keshi pearls form in a small oyster and so they produce a much smaller pearl and look like miniature branches. South sea and Tahitian Keshi pearls grow much larger and have wonderful shapes, which are used much more frequently in jewelry designs.

Even today, there is a lot of controversy about the formation process of Keshi pearls but we have two generally accepted descriptions. The first process is when an oyster is nucleated with a mother- of -pearl bead that is implanted with a small piece of mantle tissue from a donor oyster. However, a percentage of the implanted oysters will reject the bead but the tissue may remain. This tissue then stimulates the oyster in order to produce a pearl sac. This pearl sac does not include a round nucleus, which helps in forming a Keshi pearl, thus the unique shape found only in Keshi pearls.

The second process is when an oyster forms a pearl around the bead and the small piece of the mantle tissue separates. When the tissue separates it induces separate pearl sacs, and now will proceed just as the first process and now the pearl sacs will be free from a round nucleus, which helps in forming a Keshi pearl.

Keshi pearls are not intentionally produced, however Keshi pearls are partialy natural pearls and are therefore valuable. However, Keshi pearls are bi-products of the culturing therefore they cannot be considered 100% natural pearls.

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Kasumiga Pearls and Biwa Pearls

Kasumiga and Biwa pearls are two types of pearls cultured in the freshwater lakes in Japan.

Kasumiga pearls are a new type of pearl harvested from the Kasumigara lake just north of Tokyo. These pearls are obtained from a mussel, which is a crossbreed between Japanese and Chinese freshwater mussels. Seeds inserted into mussel are mostly round or flat.

These pearls are large because the nucleus inserted is large. Kasumiga pearls have very unusual colors from purple to pink, and white to golden. Kasumiga is trademarked name, but these pearls are also called Kasumi pearls.

Biwa pearls are cultured in the Biwa Lake near Kyoto, Japan using freshwater mussels. They don’t have any regular shape, but they have very good color and luster. While culturing pearls, small, square Mother of Pearls are inserted instead of a seed. Biwa Lake is the largest and most ancient lake in Japan. Biwa Lake, actually, is the first site for culturing fresh water pearls.

The phrase, “Biwa pearls,” was once used to refer to all freshwater pearls. Biwa pearls a good reputation of high quality. Many times dealers use this term to impress buyers. Over harvesting and pollution caused extinction of these mussels. The production of these pearls is nearly standstill.

 
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