The shape library
Marquise
A long line, drawn to two points.
Brilliant cut
Marquise
A long line, drawn to two points.
Two tapering ends and curved sides create an elongated, lens-shaped silhouette. The outline can give jewellery a strong sense of direction.
View marquise size chart A closer look at marquiseIllustrative faceted models, shown under consistent lighting. Actual stones, facet patterns and proportions vary.
A sense of scale
Marquise
size chart.
All sizes, in two parts. Select any weight below to compare its approximate millimetre size.
Length is tip to tip; width is measured across the widest part of the outline.
Understand carat and the 4Cs01 Small stones
0.02–0.20 ct
| Carat weight (ct) | Length × width (mm, approx.) |
|---|---|
| 2×1 | |
| 3×1.5 | |
| 3.3×1.8 † | |
| 3.5×2 | |
| 4×2 | |
| 4.5×2 | |
| 4.5×2.2 † | |
| 4.5×2.4 † | |
| 4.5×2.5 | |
| 5×2.5 | |
| 5×3 | |
| 5.5×3 | |
| 6×3 |
02 Larger stones
0.25–5.00 ct
| Carat weight (ct) | Length × width (mm, approx.) |
|---|---|
| 6.5×3.5 | |
| 8.5×4 | |
| 9.5×4.5 | |
| 10.5×5 | |
| 12×6 | |
| 13×6.5 | |
| 15×7.5 | |
| 16.5×8.5 | |
| 18×9 |
† Calculated estimate from nearby published sizes. Below the smallest reference, dimensions are scaled assuming unchanged proportions. These entries describe an illustrative size, not a measured stone.
Educational estimates. Carat measures weight: 1 ct = 0.2 g. Depth, girdle and proportions affect dimensions, so there is no exact mm-to-carat conversion. Check the individual stone’s measurements and grading report.
References: Diamond Source of Virginia size chart · Palloys small-diamond chart (PDF, p. 140)GIA carat education
Character & construction
A long line, drawn to two points.
Two tapering ends and curved sides create an elongated, lens-shaped silhouette. The outline can give jewellery a strong sense of direction.
What to consider
Evaluate both points, the symmetry of the wings and any central bow tie. Compare stones in consistent lighting.
Ask for the actual measurements, report and images of the stone being offered. A shape illustration cannot establish its appearance, grading or availability.
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