Pearl 101

How to read a pearl.

A quiet education in the only gem created by a living creature — what to look for, what to ignore, and why no two are ever alike.

Loose pearls spread across softly folded ivory silk in a wide panoramic composition, sizes 6mm to 16mm — including large lustrous South Sea white pearls with pink and blue undertones, pink freshwater, perfectly round Tahitian, deep purple, golden South Sea, and Edison pearls, with heart, four-leaf clover, moon, drop, and baroque shapes

The first rule

It is always luster.

Not shape. Not size. Not color. Luster — the way light returns from within the pearl — is the single most important measure of quality.

A fine pearl doesn't simply shine on the surface; it glows. Hold it under soft light and you should see a sharp, bright reflection — almost a mirror — with a subtle iridescence beneath. A dull, chalky pearl will stay dull forever, no matter how round or how large it is.

Choose luster first. Everything else is preference.

A single round white pearl on navy silk, its surface reflecting light with mirror-like luster

In order of importance

Five things decide a pearl's worth.

Luster

The depth and sharpness of light reflected from the nacre. High luster means thick, healthy layers built slowly over years. This is what gives a pearl its life.

Size

Measured in millimeters. Freshwater pearls commonly range from 5 to 11mm; South Sea pearls can exceed 15mm. Anything above 10mm is very rare. Size affects presence, not beauty — proportion matters more than scale.

Shape

Round is the rarest and most traditional. Near-round, drop, oval, and baroque shapes carry their own character — and freshwater pearls can form naturally whimsical outlines like heart, moon, and four-leaf clover. A well-shaped baroque with fine luster can outshine a dull round pearl.

Color

White, cream, pink, lavender, gold, peacock. Color is the most personal factor of all — choose the tone that flatters your skin, not the one a chart calls rare.

Surface

Pearls are grown by a living creature, so nearly every one carries a small natural mark. Only about 3% are completely flawless — 'flawless' meaning nothing visible to the naked eye, even up close.

A gentle word on the fifth: unless you are collecting for investment, don't worry about tiny surface marks. They are the fingerprint of a natural gem — invisible to anyone but you, at arm's length. For everyday wear, luster is where your eye should live.

Freshwater & saltwater

The five pearls you should know.

Every cultured pearl belongs to one of two families: freshwater, grown in mussels in lakes and rivers, or saltwater, grown in oysters in the sea. Neither is inherently better — they are simply different expressions of the same miracle.

Freshwater

Lakes and rivers, primarily China

The most versatile pearl in the world — and the heart of Lespéra. Modern freshwater pearls grow in remarkable luster and near-round shapes, in natural whites, pinks, and lavenders, at a price that lets you wear them every day.

Nearly the entire world's supply comes from one region in China — where we source ours.

A modern star: the Edison pearl

Edison pearls are a new generation of nucleated freshwater pearls, cultivated with a technique inspired by South Sea pearl farming — a single bead nucleus per mussel, grown slowly for years. The result is something freshwater pearls never had before: large diameters of 11mm and beyond, a deep metallic luster that rivals Akoya and Tahitian pearls, and dreamy natural colors — including a soft lilac-purple found nowhere else. They were created to close the size gap between freshwater and the great saltwater pearls — and they did.

The name comes from a famous remark attributed to Thomas Edison: that there were two things his laboratory could never make — diamonds and pearls. A pearl so fine it honored the man who couldn't invent one.

Akoya

Saltwater, Japan

The classic white pearl of tradition. Akoya pearls are famed for a sharp, mirror-like luster that few others match, typically in perfectly round shapes from 6 to 9mm.

The pearl of the single white strand — timeless for a reason.

South Sea White

Saltwater, Australia and Indonesia

The great white pearl of the southern seas — grown in silver-lipped oysters into generous sizes of 10 to 15mm and beyond. Its luster is soft and satiny rather than sharp, a glow that feels lit from within.

Often called the queen of pearls — the rarest white pearl in the world.

South Sea Golden

Saltwater, the Philippines and Indonesia

Grown in gold-lipped oysters, these pearls carry a natural golden body color — from soft champagne to deep, saturated gold. The deeper the gold, the rarer the pearl.

Warm, regal, and unmistakable — no other pearl wears this color naturally.

Tahitian

Saltwater, French Polynesia

The naturally dark pearl — grey, peacock green, aubergine, and black, straight from the oyster. Dramatic and unmistakable, usually 8 to 14mm.

Proof that a pearl doesn't have to be white to be classic.

Baroque pearls with organic freeform shapes arranged beside classic round white pearls on ivory silk

A note on shape

Perfectly round is one kind of beauty. Not the only kind.

Round pearls are the rarest — nature seldom makes a perfect sphere. But baroque pearls, with their freeform, sculptural shapes, are proof that irregularity can be more interesting than symmetry.

At Lespéra we select both — round strands for tradition, baroque forms for character. What we never compromise on is luster. A glowing baroque pearl will always outshine a dull round one.

From the source

Selected where the world's pearls are born.

Our freshwater pearls come from the region in China that produces nearly ninety percent of the world's supply — selected in person, through a friendship of twenty years. Every strand, every pair, every single pearl is chosen by hand for its luster before anything else.

We'll soon share photographs from our sourcing journeys — the lakes, the harvests, and the hands that sort thousands of pearls so that a few dozen make it here.

Now you know what to look for.

Every Lespéra piece is chosen luster-first. See the difference for yourself.

Shop the Collection How to Care for Pearls