Keshi Pearls: The Jewelry World's Best-Kept Secret

I want to tell you about keshi pearls, because I do not think they get nearly enough attention — and because working with them has given me some of my most satisfying pieces.

If you are not familiar with keshi pearls, you are not alone. Even many jewelry buyers who consider themselves knowledgeable have not heard the term. It is one of those subjects where the more you know, the more you appreciate the gem — and I find that genuinely exciting.

WHAT ARE KESHI PEARLS?

The word "keshi" comes from the Japanese "keshinomi," which means poppy seed. It was originally used to describe tiny, seed-like pearls that formed unintentionally inside oysters being farmed for Akoya cultured pearls. These accidental pearls were small, irregular, and composed entirely of nacre — the lustrous, crystalline material that gives pearls their characteristic glow.

Today, the term keshi is used more broadly to describe non-nucleated cultured pearls that form as a by-product of the cultivation process. Here is how it happens: when a pearl farmer implants a nucleus — a shell bead plus a piece of donor tissue — into an oyster or mussel, sometimes the mollusk rejects the bead nucleus. Rather than simply expelling it, the mollusk sometimes closes around the remaining tissue fragment and continues secreting nacre around it, without a bead inside.

The result is a pearl that is 100 percent nacre, from center to surface.

This matters because nacre is what we actually value in a pearl. The richness of luster, the depth of color, the iridescent play of light — all of that comes from nacre. In a typical cultured pearl, the nacre layer is a coating around a shell bead core, meaning the bead is the majority of the pearl by volume. In a keshi pearl, there is no bead. It is nacre all the way through.

WHY KESHI PEARLS ARE PRIZED

Nacre content is directly related to luster. A keshi pearl, being entirely nacre, tends to have exceptional luster — often visibly richer than a nucleated pearl of the same size and grade. There is a depth to the glow that catches light beautifully and shifts as you turn the pearl.

Because keshi pearls form without a nucleus to guide their shape, they are almost always baroque — irregular, flat, wing-shaped, or petal-like. They are almost never round. This makes them ideal for artisanal jewelry that celebrates natural form rather than conformity.

Freshwater keshi pearls, grown in mussels rather than oysters, tend to be larger and more varied in shape than the original tiny Akoya keshis. They can range from just a few millimeters to over two centimeters in length, and their flat, organic shapes drape beautifully in earrings and necklaces.

Assael, one of the world's premier pearl houses, describes keshi pearls as "made up of all nacre, which makes them among the finest in quality." Rapaport, the jewelry industry's trade publication, notes that keshi pearls are increasingly sought after by collectors and discerning buyers who understand the relationship between nacre depth and luster quality.

"Every keshi pearl I work with started as an accident — the mollusk's rejection turned into something extraordinary. That feels like a metaphor I keep coming back to." — Claudine Turkman, Certified Gemologist and Founder, Loulia Pearl Jewelry

KESHI PEARLS AND HOW I USE THEM

I came to keshi pearls because I kept being drawn to the shape and the glow. When I am working at my bench, I test each pearl under my loupe, looking at the surface and the way light moves across it. A good keshi pearl has something I can only describe as a sense of movement — the luster shifts as you tilt it, almost like watching water.

I use keshi pearls in both single-pearl statement pieces and in grouped designs where the varying shapes create an organic, flowing rhythm. Because each pearl is genuinely different, no two pieces can be identical. That is, honestly, exactly how I prefer to work.

WHAT TO LOOK FOR IN KESHI PEARL JEWELRY

If you are evaluating a keshi pearl piece, here is what I consider:

Luster first, always. This should be your primary criterion. Look for a high, almost mirror-like reflection on the pearl's surface. Dull or milky-looking keshis indicate lower-quality nacre or poor cultivation conditions.

Surface quality. Keshi pearls are baroque, so surface irregularities are natural and expected. What you want to avoid are deep pits, peeling, or areas where the surface looks granular rather than smooth.

Shape and proportion. A flat, petal-shaped keshi earring is elegant precisely because of its natural form. Evaluate whether the shape works with the design, rather than applying round-pearl standards.

Color and overtone. Freshwater keshi pearls come in white, cream, pink, lavender, and silver. The overtone — that secondary shimmer of color in the light — is often rose or green, and adds real depth to the piece.

Maker knowledge. One of the most telling things you can do when buying handmade jewelry is ask the maker about their materials. If someone is working with keshi pearls, they should be able to tell you what kind, where they came from, and why they chose them. That level of care and knowledge reflects directly in the finished piece.


If you would like to see some of the keshi pearl pieces I have been working on recently, I would love to show you. Each one is made by my hands, from materials I have chosen carefully.

You will find what is currently available in my shop and on Etsy. Link in bio.

Loulia Pearl Jewelry: Handcrafted, one-of-a-kind pearl and gemstone jewelry. Made with love in Canada. Free shipping across Canada. Duty-free delivery to the U.S. under CUSMA.