Keshi are the free-form pearls of the pearl world: no bead inside, no two alike, and often more luster than the round pearls they grow beside. This guide covers where the name comes from, how keshi form, the difference between saltwater and freshwater keshi, and what to look for when you buy them.
Part of our pearl education series.
What are keshi pearls?
A keshi is a pearl that grows without a bead, as a by-product of pearl farming. It forms when the oyster or mussel rejects the bead but keeps building nacre around the leftover tissue. With nothing inside to shape it, every keshi is free-form.
What’s in a name
CIBJO, the international jewelry confederation behind the Pearl Book, uses “keshi” only for non-bead cultured pearls from saltwater oysters, and asks sellers to call them keshi cultured pearls. In the trade, “freshwater keshi” is also widely used for similar bead-less freshwater pearls.
History: how keshi were discovered
Keshi were never the goal. They turned up as a surprise when pearl farmers opened their harvest, and over a century they went from oddities to some of the most sought-after shapes in the trade.
- Early 1900sA surprise in the Akoya harvestAs bead culturing takes off in Japan, farmers find tiny bead-less pearls in their Akoya oysters, often just a millimeter or two. They call them keshi, “poppy seeds.”
- 1950s–1960sBigger oysters, bigger keshiPearl farming spreads to the large South Sea oyster in Australia and Southeast Asia, then to the black-lip oyster in French Polynesia. Their keshi are far larger and more colorful.
- 1990s–2000sFree-form fashionDesigners embrace baroque and organic shapes, and keshi move from loose lots into finished strands.
- TodayRarer in saltwaterMany saltwater farms now X-ray their oysters after grafting and re-graft any that rejected the bead, so fewer saltwater keshi reach the market. Freshwater farms supply most of the keshi sold today.
How a keshi forms
A keshi starts the same way as a bead-cultured pearl. The difference is what happens next. Tap through the four stages.
Step 1 of 4
Grafting
A technician places a round shell bead in the oyster with a small square of mantle tissue from a donor. The tissue is what grows the pearl sac.
Step 2 of 4
The bead is rejected
Sometimes the oyster pushes the bead out, but the living graft tissue stays behind. In other cases a piece of the tissue drifts off and forms a second sac on its own.
Step 3 of 4
Nacre keeps growing
The pearl sac keeps doing its job with nothing to coat. It lays down nacre around itself, folding and rippling into a free-form shape.
Step 4 of 4
A keshi at harvest
At harvest the farmer finds a bead-less pearl beside, or instead of, the cultured pearl. Built from nacre alone, it is often brighter than its bead-cultured neighbors.
Saltwater keshi
Saltwater keshi come from the same oysters as Akoya, South Sea and Tahitian pearls, and each one carries the color family of its oyster.
| Type | What to expect |
|---|---|
| Akoya keshi | The original keshi. Usually very small, white to cream with rose or silver overtones. |
| South Sea keshi | Larger and thicker, in white, silver, cream and gold from the silver-lip and gold-lip oysters. |
| Tahitian keshi | Naturally dark: gray, silver, green and peacock, often in drop and baroque shapes with strong overtones. |
Tahitian keshi up close
Turn a hank of Tahitian keshi in the light and every pearl shows a slightly different overtone. These are from our recent stock.
Tahitian keshi hanks: silver, gray and peacock
Tahitian keshi in hand: drops and baroques
Freshwater keshi
Freshwater keshi grow in the same mussels as other freshwater pearls. Most form as by-products of culturing, some in the pearl sacs left behind after an earlier harvest. Their natural colors run from white and cream to pink, lavender and peach, often with strong rainbow orient. They come in three looks.
“Cornflakes”
Petal keshi
Thin, flat petals with rippled edges and strong rainbow orient. The trade often calls these cornflakes. They layer into airy, textured necklaces.
11–14 mm · rarer
Full-body keshi
Thicker and fuller through the body, so they read more like a pearl than a petal. Bright, mirror-like luster with silver, green and rose orient. Much harder to find.
Statement size
Extra-large keshi
Oversized, sculptural petals with folded edges, strung for a bold collar. Pieces this large are uncommon in any harvest.
Saltwater vs. freshwater keshi
| Saltwater keshi | Freshwater keshi | |
|---|---|---|
| Grown in | Akoya, South Sea and Tahitian oysters | Freshwater mussels |
| Colors | Follow the oyster: white, gold, gray, peacock | White, cream, pink, lavender, peach |
| Shapes | Drops, baroques and small free-forms | Petals, cornflakes, full-body and oversized shapes |
| Availability | Increasingly scarce | Steady supply, with full-body and large sizes rarer |
What to look for
- Luster first. The best keshi have sharp, mirror-like reflections. Shape varies by nature, so luster is what separates good from great.
- Body. Thicker, fuller pearls are rarer and more valuable than thin petals of the same size.
- Matching. In a strand, look for shapes and colors that flow together, even though no two pearls are the same.
- Surface. Ripples and folds are part of the charm. Chips, cracks or dull patches are not.
- The type. Ask whether keshi are saltwater or freshwater, and which oyster. It affects color, rarity and price.
Keshi need the same gentle care as any pearl. See our pearl care guide.
Frequently asked questions
A keshi is a non-bead cultured pearl that forms as a by-product of pearl farming, usually when an oyster or mussel rejects its bead but the graft tissue keeps making nacre. The name comes from the Japanese word for poppy seed.
No. Keshi have no bead, but they only form because people grafted the oyster or mussel, so they are cultured pearls. Calling them natural is a common mistake.
Saltwater keshi come from Akoya, South Sea and Tahitian oysters and share their colors. Freshwater keshi come from mussels, are more plentiful, and are known for petal shapes and pastel colors with rainbow orient.
It is a trade nickname for thin, flat petal keshi with rippled edges, which look a little like cornflakes. Thicker, full-body keshi are rarer.
Most are largely nacre, which is why they are so bright. But labs have found organic-rich cores and small cavities in some keshi, so solid nacre is a description, not a guarantee.
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Black-lip oysterTahitian PearlsThe history, colors and lagoons of French Polynesia’s black pearls.Read the guide Care · Every pearl typePearl CareHow to wear, clean and store pearls, what keeps their luster and color, and the mistakes to never make.Read the guide