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A hexagon cut diamond is a flat-sided, six-sided step-cut shape — no points, no curves, just six straight edges meeting at even angles — prized for its clean geometric outline and open, mirror-like table. Guru Diam stocks 473 hexagon diamonds on hand, CVD-grown and IGI-certified on request, cut in-house from our New York Diamond District and Los Angeles desks.
What is a hexagon cut diamond?
A true hexagon is a step-cut shape: six flat sides, no pointed ends, broad parallel facets running around a wide open table instead of the many small facets of a brilliant cut. That flat, faceted outline is what buyers mean when they search “hexagon cut” — and it’s worth being precise about, because the name gets used loosely in the trade. A Dutch Marquise, also sold as a Brilliant Hexagon, is a related but different stone: elongated, pointed at both ends, and brilliant-faceted for maximum fire rather than the quiet, geometric flash of a true hexagon. See our Dutch Marquise / Brilliant Hexagon guide for that shape specifically — this guide covers the flat-sided, step-cut hexagon only.
Hexagon diamonds are cut in two general proportions: a near-equilateral hexagon, where all six sides run close to the same length for a compact, symmetrical outline, and an elongated hexagon, stretched along one axis for a more dramatic finger-covering look. Both are step-faceted, which means the light performance reads as broad, alternating flashes — the “hall of mirrors” effect associated with emerald and Asscher cuts — rather than the scattered sparkle of a brilliant cut.
Hexagon vs. Dutch Marquise (Brilliant Hexagon)
| Spec | Hexagon (step-cut) | Dutch Marquise / Brilliant Hexagon |
|---|---|---|
| Outline | Flat-sided, no points | Elongated, pointed at both ends |
| Faceting | Step-cut (broad, flat planes) | Brilliant-cut (high fire) |
| Light behavior | Broad flashes, hall-of-mirrors | High fire and scintillation |
| Typical use | Center stone or accent | Center stone, antique-style settings |
| Trade rarity | Uncommon, calibrated stock available | Very low, mostly made-to-order |
How hexagon diamonds are used
Hexagon is one of the few step-cut shapes that works comfortably as either a center stone or an accent stone. As a center stone, its flat sides and low, open profile suit minimalist and geometric engagement ring styles — bezel settings and low-profile solitaires in particular, where the hexagon’s straight edges read as architectural rather than fussy. As an accent stone, hexagons are set in pairs or clusters flanking a round or oval center, or used as a repeating motif in eternity and stacking bands, where the flat sides tile cleanly against each other.
Elongated hexagons in particular have picked up in demand alongside the broader emerald-cut and geometric-jewelry trend, since the extra length reads as an elongated silhouette on the finger without the pointed ends of a marquise or Dutch Marquise. Buyers sourcing hexagon for a signature piece should specify both the L:W ratio and the faceting depth up front — small changes in either shift the stone from sharp and architectural to soft and rounded, even though the outline stays a hexagon.
Certification and what to check
Guru Diam’s hexagon inventory is CVD-grown, IGI-certified on request for individual stones sold as a center stone, and calibrated/matched for accent use. Before committing to a stone, confirm the length-to-width ratio (near-equilateral hexagons run close to 1:1; elongated versions typically 1.2–1.5), the symmetry of the six angles — an uneven hexagon is visually obvious in a way an uneven round is not — and, for step-cut stones generally, the table and depth percentages that determine whether the stone reads bright and open versus dark and “fisheye.”
Source hexagon diamonds trade-priced, in stock now
Guru Diam carries 473 hexagon diamonds on hand as IGI-certified (on request) lab-grown loose inventory, plus matched pairs and sets cut to spec for accent use, from our New York Diamond District and Los Angeles offices. Open a verified wholesale account at /signup and book time with a gemologist at /book-appointment.
FAQ
What is a hexagon cut diamond? A hexagon cut diamond is a flat-sided, six-sided step-cut shape with no pointed ends — six straight edges meeting at even angles, faceted with broad, flat planes rather than many small brilliant facets. It reads as a clean, geometric shape rather than the elongated, sparkly look of a Dutch Marquise.
Is a hexagon cut the same as a Dutch Marquise or Brilliant Hexagon? No. A hexagon cut is flat-sided with no points and step-cut faceting for a quiet, broad-flash look. A Dutch Marquise (also called Brilliant Hexagon) is elongated with pointed ends and brilliant faceting for maximum fire — a related but visually distinct shape.
Can hexagon diamonds be used as a center stone? Yes. Hexagon is one of the few step-cut accent shapes that also works as a standalone center stone, particularly in minimalist and geometric engagement ring designs with bezel or low-profile settings.
Are hexagon diamonds certified? Individual hexagon diamonds sold as center stones are IGI-certified on request. Smaller hexagons used as matched accent stones are sold as calibrated, IGI-gradable goods, the same convention used for other side-stone shapes.
