Akoya pearls grow in the small Pinctada fucata oyster and deliver the crispest, most mirror-like lustre at 6 to 9 mm, while South Sea pearls grow in the much larger Pinctada maxima and offer a softer, satiny glow at 9 to 16 mm. Akoya reads sharp and classic; South Sea reads large and luxurious.

We sort both on the same grading tables, and the contrast never stops being striking. An Akoya tray gleams like cutlery; a South Sea tray glows like candlelight. Both are genuine saltwater cultured pearls — the choice is about personality, scale and where you want the light to go.

The oyster sets the rules

Everything follows from the animal. Pinctada fucata is a palm-sized oyster from cool Japanese waters; the cold slows nacre growth into thin, dense, even layers, and that density is what returns reflections with crisp edges. Pinctada maxima is one of the largest pearl oysters on earth, farmed in the warm seas of Australia, the Philippines and Indonesia. It lays down nacre generously — often two millimetres or more around the nucleus over years — and those thick, warm-water layers scatter light gently, producing the deep satin glow the South Sea is famous for. Even harvest timing differs: Akoya farms pull pearls in winter, when cold water has tightened the final layers, while South Sea farms work to each lagoon's own calendar after two or more years of growth.

Colour widens the gap. Akoya is essentially a white pearl with cool rosé or silver overtones. South Sea spans bright white-silver through naturally golden, with the deep golds rarest of all.

Side by side on the grading table

A quick test we use ourselves: hold the pearl near a window and look at the reflection of the frame. On a fine Akoya the edges of the frame stay legible. On a fine South Sea they soften into a warm band of light. Neither is better; they are two different answers to the same question.

Wear changes the comparison too. At 6 to 9 mm an Akoya strand sits light on the collarbone and slips under a shirt collar; a 12 mm South Sea strand has real weight, the kind you notice the moment it goes on — and many clients love that heft as part of the luxury. The same split holds for earrings: Akoya studs read polished and discreet, while a South Sea pair frames the whole face.

Which should you choose?

Pick Akoya if you want the timeless mirror-bright strand, a smaller bead and crisp contrast with diamonds and white gold. It is the quintessential first fine pearl: studs, a single strand, a pendant that goes everywhere. Pick South Sea if you want presence — larger pearls, a warmer or richer body colour, and a glow that reads as quiet luxury from across a room. Many of our collectors own both and reach for Akoya by day and South Sea by evening.

Your wardrobe helps decide. Cool, minimal, diamond-led looks lean Akoya. Statement necklines, warm metals and a love of scale lean South Sea. There is no wrong answer, only the pearl you will actually wear.

Questions buyers ask us

Which pearl lasts longer?

Both last generations with simple care: on after perfume, wiped after wear, stored soft and flat. South Sea pearls carry thicker nacre, which adds a margin of durability and lets the glow survive decades of wear; dense Akoya nacre is also impressively tough for its thickness.

Which is more expensive?

Size pushes South Sea higher pearl for pearl, and natural golden colour lifts it further. A top-lustre Akoya strand is still a serious piece in its own right. Our breakdown of pearl prices by type shows exactly where the money goes in each.

Are the colours natural?

Yes. Neither pearl is ever dyed in our trays: the rosé of a fine Akoya and the gold of a South Sea are grown by the oyster, layer by layer, and we disclose colour and origin for every pearl we sell.

The best way to decide is to look. Compare our loose Akoya pearls against our loose South Sea pearls in daylight photos, and if you are torn, write to us — matching a pearl to a person is the part of this work we enjoy most.