Book Appointment
A marquise cut diamond is an elongated brilliant shape with two pointed ends and curved long edges, sized to look larger per carat than almost any other shape and to visually lengthen the finger. Guru Diam stocks 249 marquise lab-grown diamonds, IGI-certified, CVD-grown, shipped same-day from New York.
What is a marquise cut diamond?
The marquise is a boat-shaped brilliant cut — smooth curved sides meeting at two sharp points, faceted like a round brilliant for maximum fire. Its elongated outline means a marquise reads noticeably bigger face-up than a round or cushion of the same carat weight, which is the shape's core commercial appeal for buyers who want size without the price tag of a heavier round stone.
Marquise vs. related shapes
| Spec | Marquise (brilliant) | Marquise Step Cut | Trillion |
|---|---|---|---|
| Outline | Boat-shaped, pointed ends | Boat-shaped, pointed ends | Triangular, rounded corners |
| Faceting | Brilliant, high fire | Step-cut, flatter flash | Brilliant |
| Best for | Center stone, statement rings | Alternative flatter-light look | Side stones, statement centers |
For the step-cut variant of this same outline, see our Marquise Step Cut guide. For fancy-color marquise stones across the full color palette, see Fancy Color Marquise.
Sourcing and buying guide
The points are the marquise's main handling risk — confirm prong protection at the tips before setting, and check bow-tie visibility (a shadow effect across the center) when comparing stones, since it varies stone to stone regardless of grade. Guru Diam's 249 on-hand marquise stones are IGI-certified as standard, GIA available on request, cut in-house from CVD rough.
Ready to buy? Open a verified wholesale account at /signup and book time with a gemologist at /book-appointment.
Frequently Asked Questions
What is a marquise cut diamond? A marquise is an elongated brilliant-cut diamond with two pointed ends and curved sides, designed to maximize apparent size and finger coverage relative to its carat weight.
Is marquise cut available lab-grown and certified? Yes. Guru Diam's marquise inventory is CVD-grown and IGI-certified as standard, with GIA available on request, sourced from live NYC Diamond District stock.
What should I check before buying a marquise diamond? Check the bow-tie effect (a light/dark banding across the center, varies stone to stone) and confirm the point-protection on the prong setting, since the tips are the most vulnerable part of the shape.
How is marquise different from marquise step cut? Standard marquise uses brilliant faceting for maximum fire; the step-cut version uses flat, broad facets for a different, more subdued light pattern on the same boat-shaped outline.
