Cut decides how much of the rough's colour reaches your eye. A deep native cut keeps weight and can hold colour in pale material. A precision oval with a shallow crown can make a medium blue look brighter in daylight.
Ovals and cushions are the workhorses of Ceylon sapphire. Pears suit pendants; rounds are harder to find with strong blue in smaller sizes. Portrait and specialty cuts trade symmetry for character; read the description for how inclusions interact with the face.
Watch for windowing: a pale patch in the centre where light passes straight through. Our videos rotate the stone so you can see whether the centre darkens as it should. Patchy brilliance is not always bad on included stones; it can mean the cutter worked light around a included area.
If you are matching a suite or pair, mention the mount design. A low bezel can make a stone look darker; an open setting shows more of the pavilion. We can advise on proportions when you inquire.