The hardest natural substance on earth. A single element — pure carbon — arranged with such geometric precision that it becomes transparent, adamantine, and permanent. And then, when trace elements intervene, it becomes something far more interesting.
Most people think of diamond as colourless. In truth, colourless diamond — the icy, graded, certificated stone of engagement ring tradition — is only one expression of the mineral. Diamond occurs in every colour. Blue. Pink. Green. Yellow. Orange. Black. And the colour family I find most compelling: the natural browns, from pale champagne to deep cognac, that emerge from structural distortion within the crystal lattice.
A colourless diamond is a feat of geology. A champagne diamond is a geological event with a story written into its structure. The colour is not a defect. It is documentation.
My personal favourites come from Borneo — specifically from alluvial deposits that produce diamonds with a warm, golden-brown saturation unlike anything from South Africa or Canada. These stones carry a particular quality of light: they absorb the blue end of the spectrum and return the warm tones with an almost amber richness. In certain lights, a well-cut Bornean champagne diamond glows from within like a lit lantern.
The colour grading system for fancy coloured diamonds runs from C1 (lightest champagne) through C7 (deepest cognac). The stones I source tend to sit in the C3–C5 range — deep enough to read as distinctly warm, light enough to retain transparency and fire. They work extraordinarily well with yellow gold, which doubles down on the warmth rather than fighting it.
These are also stones that resist trend. They have been undervalued by the market for decades precisely because the market was trained to value absence of colour. That is changing — but the window of acquiring exceptional material at honest prices remains open.
Beyond champagne, the world of natural fancy colour diamonds is among the rarest in gemology. Natural blue diamonds get their colour from boron. Natural pink and red diamonds — the rarest of all — owe their colour to structural deformation of the crystal lattice during formation. Natural green diamonds are irradiated by radioactive minerals in the earth over millions of years, producing a colour that exists only at the surface of the stone. These are not curiosities. They are geological phenomena.
The Argyle mine in Western Australia produced approximately 90% of the world's pink diamonds before closing permanently in 2020. That closure created a supply cliff that the market is still processing. Argyle pinks are coloured by a rare combination of plastic deformation during formation — the exact mechanism still debated by gemologists — producing colours from pale blush through vivid rose to deep purplish-red. The mine is gone. The stones that exist now are all there will ever be.
The finest Argyle pinks — those selected for the annual Argyle Pink Diamonds Tender — are among the most coveted objects in fine jewellery. But even smaller, lighter stones from this source carry a provenance that cannot be replicated. The certificate says Argyle. The mine is closed. That combination will only appreciate with time. If I encounter genuine Argyle material with documentation, I bring it home.
Lab-grown diamonds are chemically identical to natural diamonds. I understand the appeal — lower entry price, no mining footprint on the surface, no complex supply chain. I also understand the argument. But my honest position is this: I would always gently try to redirect a client toward a natural stone, and here is why.
The sustainability case for lab-grown diamonds is weaker than it appears. Growing a diamond in a reactor requires enormous quantities of energy — typically from non-renewable sources — over days or weeks of sustained high-pressure, high-temperature conditions. The process begins with a natural diamond seed, which itself must be mined. The carbon footprint per carat is significant and rarely disclosed transparently. "Green" is a marketing position, not yet a verified reality for most producers.
The value case is equally fragile. Technology products follow a consistent pattern: costs fall with scale and innovation, and prices follow costs down. A lab-grown diamond purchased today for a meaningful sum will almost certainly be worth a fraction of that within a decade as production scales and reactor efficiency improves. This has already happened — lab-grown diamond prices have dropped dramatically in just five years. A natural stone, by contrast, is finite. The mine eventually closes, the deposit is exhausted, and the material that exists is all there will ever be.
For clients with genuine budget constraints, I would rather suggest a natural white sapphire, a white zircon, a colourless spinel, or a white topaz — all earth-mined, all genuinely rare, all carrying the geological history that makes a stone meaningful. These are not compromises. They are honest alternatives that will hold their character and their value in a way that a laboratory product cannot.
My work is built around the irreplaceable. That is a principle I cannot set aside at the diamond counter.
Black diamonds occupy a separate category entirely. Natural black diamonds — known as carbonado — are polycrystalline aggregates with a different origin story from gem diamonds. Their origin is debated: some researchers believe they formed in space and arrived via meteorite. Their surface absorbs light rather than refracting it, which gives them their absolute darkness. They suit architectural, masculine, or deliberately anti-conventional design thinking. I find them compelling precisely because they behave nothing like a conventional diamond.
I use diamond primarily as a structural element — halos, pavé, accent stones — rather than as the hero. The exception is champagne and fancy colour material, where the stone is interesting enough to lead. In a house whose design language is built around character-rich coloured stones, diamond earns its place by amplifying what surrounds it rather than demanding the room for itself.
From the Métamorphism collection
Other stones in the collection
I source Bornean material selectively. When I find something exceptional, I bring it home.
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