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A 1 carat marquise measures about 10.0 × 5.0 mm and a 1 carat Dutch Marquise about 9.0 × 4.8 mm, so at the same weight the marquise is about 1.0 mm longer. The bigger difference is the outline. A marquise is a navette, pointed at both ends with two long curved sides. A Dutch Marquise is an elongated hexagon: six straight sides, two points, and no curve anywhere.
The names make them sound like close cousins, and they do share a long, two-pointed silhouette and brilliant faceting. Every line of the outline is different, though, and that changes how each one looks on the hand. Here is how they compare on size, on the finger and in everyday wear.
The marquise, also called a navette, French for little boat, has two points joined by two long sides that bow outward in one continuous curve. That curve is what makes it a marquise. The classic ratio is around 1.90 to 2.00, long enough to look elegant without making the points fragile.
The Dutch Marquise keeps the length and the two points, then rebuilds the outline from straight lines. Trace its edge and you count six sides: a point at the top, a point at the bottom, and two flat shoulders down each side. It sits between a marquise and a hexagon, and it reads architectural rather than soft. In outline it is closer to an emerald cut than to the curved navette people expect from the name.
Length by width in millimeters at each carat weight. The Dutch Marquise is one of our own cuts and has no published trade chart, so its figures are Ronora's working sizes.
| Carat | Marquise (mm) | Dutch Marquise (mm) | Marquise longer by |
|---|---|---|---|
| 0.50 ct | 7.9 × 4.0 | 7.1 × 3.8 | 0.8 mm |
| 0.75 ct | 9.1 × 4.5 | 8.2 × 4.4 | 0.9 mm |
| 1.00 ct | 10.0 × 5.0 | 9.0 × 4.8 | 1.0 mm |
| 1.50 ct | 11.4 × 5.7 | 10.3 × 5.6 | 1.2 mm |
| 2.00 ct | 12.6 × 6.3 | 11.3 × 6.1 | 1.3 mm |
| 2.50 ct | 13.6 × 6.8 | 12.2 × 6.6 | 1.4 mm |
| 3.00 ct | 14.4 × 7.2 | 12.9 × 7.0 | 1.5 mm |
| 4.00 ct | 15.9 × 7.9 | 14.2 × 7.7 | 1.6 mm |
| 5.00 ct | 17.1 × 8.5 | 15.3 × 8.3 | 1.8 mm |
At our working proportions the marquise is cut to a 2.00 ratio and the Dutch Marquise to 1.85, so the Dutch Marquise is a little shorter and slightly less elongated at the same weight. Both are far longer than a round: a 1 carat round is 6.5 mm across, so the marquise is 54% longer and the Dutch Marquise 38% longer.
The marquise has a useful property: its curved outline fills about two thirds of the rectangle around it, so a 1 carat marquise shows about 33.3 square millimeters face-up, almost exactly the same as a 1 carat round at 33.2. It looks bigger than a round because it is longer, not because it shows more surface.
There is no agreed area figure for the Dutch Marquise, so we compare it by length and width only. On the hand both read as long, finger-lengthening shapes. The marquise is a little longer; the Dutch Marquise is crisper, because its straight shoulders catch the eye as clean lines.
Set north-south, the width of the stone is what crosses the finger. This table shows that width and the share of a US size 6.5 finger it covers (16.9 mm inside diameter).
| Carat | Marquise width | Marquise covers | Dutch Marquise width | Dutch Marquise covers |
|---|---|---|---|---|
| 0.50 ct | 4.0 mm | 23% | 3.8 mm | 23% |
| 1.00 ct | 5.0 mm | 30% | 4.8 mm | 29% |
| 1.50 ct | 5.7 mm | 34% | 5.6 mm | 33% |
| 2.00 ct | 6.3 mm | 37% | 6.1 mm | 36% |
| 3.00 ct | 7.2 mm | 43% | 7.0 mm | 41% |
Across the finger the two are almost identical, and both are narrower than a round, which covers 38% at 1 carat. The difference you notice is length: the marquise runs 10.0 mm along the finger at 1 carat, the Dutch Marquise 9.0 mm.
Both shapes have two points, and points are the most exposed part of any diamond. In a ring they should be protected, usually with V-shaped prongs that cover each tip, or with a bezel that wraps the whole outline. With that protection either shape is well suited to everyday wear. If you work with your hands, a bezel or a low setting is worth considering for both.
The marquise has been cut for centuries and has well established size charts. The Dutch Marquise is one of our own cuts and one of the rarest shapes in the Ronora range. There is no published trade chart for it, so the sizes in this article and in Find Me Diamond are our working sizes. On a grading report it may be described by its outline and faceting rather than by the name. Ask us for the exact measurements of any stone before you order.
Choose the marquise if you want the most length for your weight and a softer, romantic outline with a vintage story behind it. Choose the Dutch Marquise if you love the long silhouette but want something more geometric and modern, a shape that looks drawn with a ruler. Both lengthen the finger, and both are narrower than a round of the same weight.
A marquise has 2 long curved sides meeting at 2 points; a Dutch Marquise has 6 straight sides, with 2 points and flat shoulders between them. At 1 carat the marquise measures about 10.0 × 5.0 mm and the Dutch Marquise about 9.0 × 4.8 mm at our working sizes.
At 1 carat the marquise is about 1.0 mm longer, 10.0 mm against 9.0 mm, so it looks slightly bigger along the finger. Across the finger they are almost the same, covering 30% and 29% of the width of a US size 6.5 finger.
Yes, in outline: a Dutch Marquise is an elongated hexagon with 6 straight sides and 2 points, faceted as a brilliant. The name comes from the long, two-pointed silhouette it shares with the marquise, but the shape itself has no curves at all.
Yes: a 1 carat Dutch Marquise is a real diamond of about 9.0 × 4.8 mm, cut to a hexagonal outline. The name describes the shape, not the material. Every Ronora Dutch Marquise is a real CVD lab grown diamond, Excellent cut, D-E-F colorless with VVS clarity.
Of the 12 shapes we cut, the Dutch Marquise is one of the rarest, and there is no published trade size chart for it. On a grading report it may be described by its outline and faceting rather than by the name Dutch Marquise, so ask us for the exact measurements of any stone.
See both at actual size on your ring size: open a 1 carat Dutch Marquise in Find Me Diamond, then a 1 carat marquise on the same finger. Read the full marquise guide and Dutch Marquise guide, and browse lab grown diamond engagement rings or 1 carat engagement rings. Every Ronora diamond is a real CVD lab grown diamond, Excellent cut, D-E-F colorless with VVS clarity, made to order in Surat.
