Argyle Australian Champagne Diamond — 0.73ct Cushion Cut| C4 - Medium Champagne

Why we chose this stone

The radiant cut was designed to combine the best of both worlds — the crisp geometry of an emerald cut with the sparkle of a brilliant — and this 0.73ct stone puts that hybrid faceting to good use on a classic C4 colour. Rather than laying the golden tone out flat the way a pure step cut would, the radiant's trimmed corners and additional facets break the colour into small, shifting flashes, giving the stone real movement without losing any of its structured, architectural look. It's a cut that suits champagne diamonds particularly well, since it lets the colour show clearly while still delivering genuine fire. It comes from the East Kimberley region of Western Australia, the source of every Argyle diamond mined before the pipe's closure ended that supply permanently.

At 0.73ct, this is a versatile centre-stone size, and its C4 grade is the tone most buyers picture first when they think "champagne diamond" — warm, recognisable, and easy to build a design around. It's a practical, classic combination from a mine that will never produce another one.