What a Hexagon Cut Diamond Is
A hexagon cut diamond is a six-sided diamond with a long, geometric outline. It can be faceted in different styles: a step cut, with clean parallel lines and an architectural look, or a brilliant style, for more sparkle. The six-sided outline is the shape; the faceting is a separate choice.
It is one of the more distinctive modern shapes, and it is closely related to one of our signature cuts. Here is what it is, who tends to love it, and what to check before you buy.
The shape, and the faceting
Two things define how any hexagon reads, and they are independent of each other:
The outline: six sides in a long, narrow arrangement. This is what gives the shape its clean, geometric look and its length on the finger.
The faceting: a step cut gives broad, flat facets and clear, mirror-like flashes; a brilliant style breaks light into smaller, busier sparkle. Same outline, very different personality.
Neither faceting style is higher quality than the other. They are aesthetics. Decide which look you want, then judge the specific stone.
How it relates to the Dutch Marquise
Our signature Dutch Marquise is a specific elongated hexagonal cut: a long, six-sided outline whose long edges meet in angular points and that tapers toward each end rather than finishing in a flat edge. So every Dutch Marquise is a hexagonal cut, but not every hexagonal cut is a Dutch Marquise. If you are searching for an "elongated hexagon engagement ring," the Dutch Marquise is the version we source and set. See the Dutch Marquise guide for that specific cut, including what a grading report says about it.
Who a hexagon cut suits
A hexagon cut tends to suit someone who wants a modern, geometric look rather than a classic round or oval, and who likes the way an elongated shape lengthens the hand. Like other elongated shapes, it faces up large for its carat weight, so it can look bigger than a round of the same weight. It is a distinctive choice, which is part of the appeal for a buyer who does not want the same ring as everyone else.
What to verify before you buy
A hexagon is a specialty shape, so a few checks matter more than usual:
Most fancy shapes carry no overall cut grade from the labs, so cut quality varies. Look at the actual stone and its proportions.
"Hexagon," like most specialty names, may not appear on the report. Labs describe the measurable geometry instead. Read the measurements rather than trusting the label.
Confirm the report on the issuing lab's own site, and check for the "LG" inscription if it is a Lab Grown Diamond. Note that IGI and GCAL still issue full 4C-style reports for Lab Grown Diamonds, while GIA now grades Lab Grown Diamonds on Premium and Standard descriptive tiers rather than the full 4Cs. (Source: GIA, 2025-10-01.)
The rule that covers all of it: a name is marketing, the report is fact.
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FAQ's
A hexagon cut diamond is a six-sided diamond with a long, geometric outline. It can be faceted as a step cut for a clean architectural look or in a brilliant style for more sparkle. The outline is the shape; the faceting is a separate choice.
Not exactly. A Dutch Marquise is a specific elongated hexagonal cut with angular points along its long edges and tapered ends. Every Dutch Marquise is hexagonal, but not every hexagon cut is a Dutch Marquise.
Usually no. Most fancy shapes carry no overall cut grade from the labs, so cut quality varies. Judge the specific stone by its proportions and how it looks, and read the report.
Often not. Labs certify measurable geometry, not marketing names, so the report describes the shape rather than printing a specialty name. Read the measurements and confirm the report on the lab's own site.