South Sea Pearls

South Sea pearls are grown in Pinctada maxima, the largest pearl oyster, across northern Australia, Indonesia, the Philippines and Myanmar. They sit at the top of the cultured pearl market.

Why they cost what they do

• Size. Commonly 9 to 20 mm — several times the volume of an Akoya.
• Nacre thickness. Often 2 mm or more, compared with under half a millimetre for Akoya. This is what produces their deep, satiny glow and makes them extremely durable.
• Growth time. Two to four years per pearl, against under a year for many freshwater pearls.
• Yield. The oysters are large, delicate and difficult to farm, and losses are high.

The golden variety

The gold-lipped variant of Pinctada maxima, farmed mainly in the Philippines and Indonesia, produces naturally golden pearls ranging from pale champagne to deep 24-karat gold. Deep natural gold commands a substantial premium — and, as with Tahitians, dyed imitations exist, so provenance matters.

Lustre character

South Sea lustre is different in kind from Akoya. Where Akoya is sharp and mirror-like, South Sea is soft, deep and satiny — the light appears to come from within the pearl rather than off its surface. Neither is better; they are different effects.

What they cost

A single good 11 mm white South Sea pearl pendant starts around £600. Strands begin in the low thousands and rise steeply with size and matching; a matched 13–15 mm golden strand is a five-figure piece.

Who they suit

Serious jewellery purchases, heirloom pieces and anyone wanting maximum presence. The thick nacre also makes them, somewhat counter-intuitively, among the most robust pearls you can own.