Short answer
Shape is the first decision most couples make, often before they know anything else about the stone, and it deserves more thought than it usually gets. Round brilliants account for the majority of diamonds sold, and for good reason — the cutting standards are the most refined of any shape, which means round diamonds are the most consistent in maximizing brilliance for a given quality.
Round brilliant: the benchmark
Round brilliants account for the majority of diamonds sold, and for good reason — the cutting standards are the most refined of any shape, which means round diamonds are the most consistent in maximizing brilliance for a given quality. If sparkle and a timeless, safe choice matter most to you, round is very hard to beat.
The tradeoff is cost: round cuts waste more of the rough stone during cutting than fancy shapes, so you pay a premium per carat compared to an oval or cushion of equal quality. Round also looks smaller per carat than elongated shapes, since it has less surface area for its weight.
Oval: size and a modern look
Ovals have become one of the most requested shapes I sell, largely because they combine strong brilliance with an elongated shape that looks larger per carat and flatters most finger shapes by elongating the hand visually. They also tend to cost less per carat than round for comparable quality.
The main thing to check with ovals is the bowtie effect — a dark shadow across the stone's width that appears in every oval to some degree but varies from barely noticeable to distracting. Always view the actual stone, ideally on video, before committing.
Cushion: vintage character
Cushion cuts have rounded corners and larger facets that produce a softer, slightly vintage-feeling sparkle rather than the sharp scintillation of a round brilliant. They come in two broad styles: chunky, "crushed ice" cushions with lots of small facets, and classic cushions with a more traditional facet pattern — worth seeing both before deciding which look you prefer.
Cushions can hide inclusions and slight color reasonably well due to their facet pattern, which sometimes allows buyers to save on clarity or color without a visible tradeoff, similar to round brilliants but with a bit more forgiveness.
How to decide
- If sparkle and resale familiarity matter most, choose round.
- If you want a stone that looks larger for the budget and a contemporary silhouette, choose oval — but check for bowtie in person.
- If you want vintage character and slightly more forgiveness on clarity and color, choose cushion.
- If you're unsure, ask to try on rings with each shape in the same approximate carat weight before deciding — shape preference is genuinely personal and changes once you see it on your hand.
What to remember
- Round brilliants maximize sparkle and hold value best but cost the most per carat.
- Ovals look larger per carat and cost less, but always check for the bowtie effect in person.
- Cushions offer a softer, vintage sparkle and can hide minor inclusions well.
- Try shapes on your own hand before deciding — preference is personal and often changes on sight.
Frequently asked questions
- What should you know about round brilliant: the benchmark?
- Round brilliants account for the majority of diamonds sold, and for good reason — the cutting standards are the most refined of any shape, which means round diamonds are the most consistent in maximizing brilliance for a given quality. If sparkle and a timeless, safe choice matter most to you, round is very hard to beat.
- What should you know about oval: size and a modern look?
- Ovals have become one of the most requested shapes I sell, largely because they combine strong brilliance with an elongated shape that looks larger per carat and flatters most finger shapes by elongating the hand visually. They also tend to cost less per carat than round for comparable quality.
- What should you know about cushion: vintage character?
- Cushion cuts have rounded corners and larger facets that produce a softer, slightly vintage-feeling sparkle rather than the sharp scintillation of a round brilliant. They come in two broad styles: chunky, "crushed ice" cushions with lots of small facets, and classic cushions with a more traditional facet pattern — worth seeing both…
- How to decide?
- If sparkle and resale familiarity matter most, choose round. If you want a stone that looks larger for the budget and a contemporary silhouette, choose oval — but check for bowtie in person. If you want vintage character and slightly more forgiveness on clarity and color, choose cushion.