Argyle Pink Diamonds: A Perth Jeweller's Guide to the World's Rarest

There are diamonds, and then there are Argyle pink diamonds — a stone so rare that, for decades, a single mine in the far north of Western Australia produced almost all of them. As a jeweller who has spent a lifetime working with West Australian gems, I can tell you there is nothing quite like holding one: a colour that seems to glow from within, in a stone the earth made in vanishingly small numbers.

With the mine now closed, these diamonds occupy a unique place — part jewel, part piece of Australian history. Here's what makes them extraordinary, and what to understand if you're considering one.

What is an Argyle pink diamond?

An Argyle pink diamond is a natural pink diamond from the Argyle mine in the East Kimberley region of Western Australia, which for nearly four decades produced over 90% of the world's pink diamond supply. Their colour ranges from soft blush through rose to rare, vivid purplish-pinks — and unlike most coloured diamonds, the exact cause of the hue is still not fully understood, thought to arise from immense pressure distorting the crystal lattice deep in the earth.

They are, in the truest sense, a Western Australian treasure — and Perth jewellers have long held a particular affection for them.

Why are they so rare?

Pink diamonds were always a tiny fraction of the Argyle mine's output — the mine was famous for its volume of champagne and white diamonds, with pinks as the celebrated exception. When the mine ceased production in 2020, the primary source of the world's pink diamonds closed with it. No comparable source has replaced it.

That combination — finite original supply, growing demand, and a closed mine — is why fine Argyle pinks are considered among the rarest gems on earth, and why they are increasingly sought by collectors as much as by those who simply love their beauty.

The Argyle grading system

Argyle developed its own colour grading scale for its pink diamonds, running from the softest pinks up to the most saturated. You'll see grades described by colour and intensity — with the vivid and deep purplish-pinks commanding the greatest rarity. Alongside colour, the usual considerations of clarity, cut and carat apply, though with coloured diamonds, colour is king.

Because origin matters enormously to value, provenance and documentation are essential. A genuine Argyle pink should come with clear evidence of its origin — and that's something to verify carefully with a jeweller you trust.

What to know before buying one

Buy for beauty and provenance together. See the stone in natural light, because pink diamonds vary enormously in how their colour presents — some glow warmly, others lean cooler or more purplish. Confirm the origin documentation. And understand that, at the finest grades, these are as much collected as worn.

Most of all, choose because you love the stone. The rarity and investment case are real, but the deeper pleasure of an Argyle pink is simply that it is unlike anything else — a piece of the West Australian earth, in a colour no other diamond quite matches.

A West Australian stone, from a West Australian workshop

There's a particular satisfaction in setting a West Australian diamond in a West Australian workshop. Whether you're drawn to an Argyle pink as a centrepiece, an accent stone, or simply want to understand what makes them special, we're glad to share what we know.

Come and talk to us in Cottesloe. Rare stones reward an unhurried conversation — and if an Argyle pink is in your future, it's a conversation worth having with people who have loved these diamonds for decades.