Argyle Australian Champagne Diamond — 0.66ct Cushion Cut| C3 - Light Champagne Gemstones Fancy Vivid is the highest

Fancy Vivid is the highest yellow colour grade

deep-toned ovals like this one are only becoming harder to source

understated character front and centre

While not accompanied by a full certificate due to the carat weight

this cushion cut carries a C3 grade with real presence — light enough to stay bright

Argyle Australian Champagne Diamond — 0.66ct Cushion Cut| C3 - Light Champagne Gemstones Fancy Vivid is the highestAt C3, colour reads as clearly champagne without ever feeling heavy a light, straw gold tone that suits this 0. 66ct cushion cut well. The cushion's rounded corners and mixed facet pattern scatter that colour into small, shifting pockets of light rather than one flat wash, so the stone stays bright and lively even at a more restrained grade. It's a balance that tends to appeal to buyers who want their Argyle diamond's rarity and provenance without a