Natural pink sapphire under half a carat rarely gets the excellent cut grade this one carries, and that wasn't an accident. When I bought the rough parcel this came from, the cutter and I looked at a handful of ways to shape it. A cushion would have kept more weight. But the crystal had the clarity and the vivid pink saturation to reward a round brilliant cut instead, one that throws light straight back at the viewer rather than pooling it in the corners.
The numbers back the decision up. At 4.34 x 4.32mm it's essentially a true round face-up, and the 2.92mm depth keeps the proportions tight enough that the stone reads bigger than 0.43ct suggests. Eye clean clarity means nothing gets in the way of that light return. It went through no heat treatment, so the pink you see is exactly what the crystal grew with in Sri Lanka, and TGL has confirmed both the origin and the untreated state on paper.
This isn't a stone built to anchor a large ring. It's an accent piece, a pendant stone, or the centre of something delicate where every bit of light matters. Collectors after unheated Ceylon pink in smaller sizes will recognise what they're looking at here.