Gemstone Cuts Guide: Marquise, Princess, and Eight More Shapes

Cut is the most misunderstood of the four Cs — buyers treat it as style when it is physics. A gemstone cut is a light-management plan: facets angled to pull light in, bounce it twice, and return it to the eye. Change the geometry and you change the brightness, the size-per-carat, the durability, and the price. This guide walks the ten shapes that matter and what each one actually does.

Quick Answer: The Ten Shapes

- **Round:** the light engine — maximum brilliance per carat, the benchmark all others are measured against; costs more per carat because more rough is lost cutting it - **Princess:** square with brilliant-style faceting — nearly the round's sparkle at a lower price per carat; corners are its weak points, wants V-prong protection in rings - **Oval:** the finger-flatterer — reads larger than a round of the same carat and slenderizes the hand; watch for the bow-tie shadow in the middle - **Marquise:** the elongated pointed oval — the most finger-lengthening shape in the case, historical royal pedigree (commissioned to match a smile, by tradition); points want protective settings - **Pear:** teardrop — pendant-perfect with one pointed end; in rings, wear the point outward for the slimming line - **Cushion:** rounded square with soft corners — vintage glow rather than modern flash - **Emerald cut:** stepped rectangles — hall-of-mirrors elegance that demands clarity (the open step facets hide nothing) - **Asscher:** the square emerald cut — Art Deco geometry, the same clarity demand - **Radiant:** the cut-cornered hybrid — brilliant sparkle in a square outline, the practical princess alternative - **Cabochon:** unfaceted dome — for stones whose value is interior (star stones, cat's eyes, turquoise, most moonstone and jade)

Three practical laws govern choosing among them. **Size-per-carat ranking:** marquise, pear, oval, and emerald cuts read biggest for the weight; rounds read smallest — an oval and round of equal carat can differ visibly in spread. **Durability ranking:** points and corners are liabilities — marquise, pear, and princess want settings that shield their tips (the setting guide lives in our birthstone ring styles piece); rounded shapes and cabochons shrug off knocks better. **Price-per-carat:** rounds carry the premium (rough-wasteful, demand-heavy); fancy shapes deliver more stone per dollar at equal quality.

Matching Cut to Stone and to Hand

Stone chemistry sets limits: deeply colored stones (garnet, amethyst, kyanite) suit step and mixed cuts that control color depth; paler stones want brilliants that add light; included stones and phenomenal materials (asterism, chatoyancy) demand cabochons — faceting would chop the phenomenon. Hand geometry, the honest version: elongated shapes (marquise, oval, pear) lengthen short fingers; wider shapes (cushion, radiant) balance long narrow hands; round is neutral on everyone — which is half its market dominance right there. The other half is that rounds simply return the most light, and a well-cut round in any gemstone never needs an explanation.