18ct Yellow Gold Natural Fancy Coloured Diamond Stacked Ring

A three-band stacked design in 18ct yellow gold, set with a 0.20ct champagne diamond centre and a scattered constellation of natural fancy-coloured diamonds, pink, yellow, orange and green, across the top and bottom rails, with a pavé diamond mid-band.

This is a ring that looks like three rings worn together but is built as one — and at the centre of it sits a parcel of natural fancy coloured diamonds from Rio Tinto, including pinks sourced before the Argyle mine closed in 2020.

Why this ring works

The stacked-band illusion is what makes this piece architecturally different. Most rings have one band. This one has three, a top rail, a pavé mid-band, and a bottom rail, all welded together to look like a stack of fine bands floating on the finger. It's a construction style that takes considerably more work than a single-band ring, but the payoff is a piece that has the visual lightness of stacking rings with the integrity and security of a single setting. Nothing slides, nothing twists, nothing gets lost.

The coloured diamonds are the entire story. Every coloured stone in this ring is a natural fancy coloured diamond, formed in the earth, not lab-grown, not treated, not coated. Natural coloured diamonds occur when trace elements or structural anomalies enter the carbon lattice during formation: boron creates blue, nitrogen creates yellow and orange, structural distortion creates pink and red. They're rare in white diamond mines, and rarer still in matched VS clarity at this colour saturation.

The pinks are the headline. These two natural fancy pink diamonds (colour grade 6-7P/PP) were sourced through Rio Tinto, the mining company that operated the legendary Argyle mine in Western Australia until its closure in 2020. Argyle was the source of more than 90% of the world's natural pink diamonds, and since the closure, pink diamond prices have continued to rise year-on-year. Stones sourced before the mine closed, carrying Rio Tinto documentation (this ring carries lot number 954086), now belong to a category that's no longer being replenished. The two pinks in this ring belong to that material.

The setting structure is doing something clever. The champagne diamond at the centre, 0.20ct, set in a yellow gold bezel, anchors the design. The smaller coloured diamonds are then scattered across the top and bottom rails in different metal bezels depending on which colour best complements the stone: white gold collars for the yellow and green diamonds, rose gold for the pinks, yellow gold for the orange. It's a small detail that takes real craft, and the reason every stone in this ring reads at its strongest colour.

The pavé mid-band (14 small white diamonds, F-G colour, VS clarity) sits between the top and bottom rails like a bright spine running through the design. It's the connective tissue of the ring, it stops the construction from looking like three separate stacking bands and pulls the whole piece together as one.

The diamonds

• 1 natural champagne diamond, 0.20ct (colour C6/7, VS clarity)
• 2 natural fancy pink diamonds, 0.11ct total (colour 6-7P/PP, VS clarity)
• 1 natural fancy yellow diamond, 0.05ct (colour FY, VS clarity)
• 2 natural fancy orange diamonds, 0.11ct total (colour FO, VS clarity)
• 2 natural fancy green diamonds, 0.16ct total (colour FG, VS clarity)
• 14 natural white diamonds, 0.10ct total (colour FG, VS clarity)
• Total diamond weight: 0.73ct
• Rio Tinto Lot Number: NV 954086

The setting

• Metal: 18ct yellow gold body with white and rose gold accent bezels (stamped 750)
• Style: Three-band stacked construction, scattered coloured diamond bezels, pavé mid-band
• Band: Low radius, tapered 4.00mm to 2.10mm
• Construction: Cast, hand-assembled, hand-finished and hand-set

A note on rarity

Rings featuring this combination of natural fancy coloured diamonds in this clarity grade, with documented Rio Tinto provenance, are not something we restock easily. The coloured diamond market, particularly for natural pinks, has fundamentally changed since Argyle's closure. Pieces like this draw from inventory that, once gone, won't be replaced with identical stones.