Glossary
Diamond Cut (Shape)
Diamond cut refers to the stone's shape and faceting pattern — round brilliant, princess, oval, marquise, emerald, cushion, pear, radiant, asscher, heart. Cut determines how light interacts inside the stone and is one of the GIA 4Cs alongside color, clarity, and carat. Different cuts photograph differently and AI must respect the cut's signature.
The ten common diamond cuts
Round brilliant — 57-58 facets, the universal sparkle standard, ~75% of engagement-ring market. Princess — square-cornered, modern look, faceted underneath. Oval — elongated brilliant, finger-flattering, trending strongly post-2020. Marquise — pointed elliptical, vintage, looks larger than its carat. Emerald — rectangular step-cut, art-deco, shows clarity prominently. Cushion — square or rectangular with rounded corners, soft romantic. Pear — teardrop, point-up or point-down. Radiant — square emerald-cut hybrid. Asscher — square emerald, distinctive X-pattern in the table. Heart — pointed lobed shape, novelty.
Why each cut photographs differently
Brilliant cuts (round, princess, oval, cushion, radiant, pear, marquise, heart) are designed to maximize light return — they sparkle as moving fire when the stone is rotated. They photograph as bright, with strong specular highlights at the table (top facet). Step cuts (emerald, asscher) prioritize transparency and "hall of mirrors" visual depth over sparkle — they photograph as glassy and reveal inclusions more clearly. Mixing photography style across cut categories breaks visual consistency in a multi-stone listing.
What AI must preserve
Cut shape and facet pattern are the buying decision. A buyer searching for "princess cut engagement ring" who lands on a listing showing an oval stone has been mis-served. AI jewelry retouching preserves the cut's silhouette pixel-faithfully and keeps the signature facet pattern intact (princess's grid of grids; round's kite-and-star pattern; emerald's step-rectangles). Stone color swap (e.g. diamond → sapphire) keeps the cut and only changes the spectrum.
See it in action
Related terms
Carat
Carat is the metric unit of mass for gemstones — 1 carat equals 200 milligrams (0.2 grams). For diamonds and other faceted stones, carat dir…
Gemstone Clarity
Clarity is the grading of internal flaws (inclusions) and surface blemishes in a gemstone. Diamonds use the GIA scale FL through I3; colored…
Stone Color Swap
Stone color swap uses AI to change the color of gemstones in a jewelry photo — diamond to sapphire, ruby to emerald — without re-photographi…
Last updated 2026-05-03