Argyle Australian Champagne Diamond — 0.76ct Round Brilliant Cut| C7 - Dark Champagne

Why we chose this stone

This 0.76ct round brilliant carries a C7 grade — the deepest, most saturated colour on the Argyle scale, a true cognac tone that shifts between dark amber and near-chocolate depending on the light. Even at three-quarters of a carat, that depth of colour holds its own; the brilliant cut's dense facet pattern keeps it moving rather than static, throwing warm, dark flashes across the stone as it turns. Colour this intense was always the rarest outcome from Argyle's rough, regardless of size, which makes finding it in a well-cut, well-proportioned brilliant like this one a genuine find. It comes from the East Kimberley region of Western Australia, where the Argyle mine produced this colour range until its closure ended it for good.

A C7 at this size offers a practical way into the darkest end of the champagne-to-cognac spectrum — full-strength colour without the size, and price, of a larger stone. For anyone drawn to the boldest, most saturated tone the Argyle mine ever produced, this is as deep as the colour scale goes, just in a more accessible carat weight.