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Emerald-cut diamonds, lab-grown and natural

The emerald cut doesn’t twinkle like a brilliant: it flashes, with long steps of light and dark. Calm and Art Deco, it also shows everything inside the stone, so it is chosen with care.

Every emerald cut we sell is certified by GIA, IGI or HRD and has a 360° video, so you can see its steps and its clarity before you buy. Below: emerald cuts in stock now, their real sizes, how to choose the ratio, and what our gemologist looks for.

See emerald-cut diamonds in stock Compare with other shapes

01 · In stock now

Emerald-cut diamonds you can buy today

Picked from stock by score, 1 to 3 carats, each with a 360° video. Prices in CAD, duties included.

See all 37,020 emerald-cut diamonds, 1–3 ct

02 · Why an emerald cut

A calm, clean look, unlike any brilliant

An emerald cut is a step cut: long, parallel facets around a rectangle with cut corners. It trades tiny sparkles for broad flashes and a clear view into the stone.

  1. Hall-of-mirrors flashes

    Its steps reflect light in broad, calm flashes rather than many small sparkles.

  2. It makes the finger look longer

    Its rectangle draws the eye along the finger. A styling effect, not a rule.

  3. Cut corners protect it

    The corners are cut off, so it is sturdier than a shape with sharp corners.

  4. An Art Deco classic

    It suits solitaires, three-stone rings and baguette side stones, and it never looks like a trend.

03 · Sizes by carat

Emerald-cut diamond sizes, in millimetres

Typical face-up size, next to a round of the same weight. Real stones vary with how deep they are cut, so always check the measurements on the certificate.

Carat Emerald, length × width Round, diameter
0.5 5.2–5.6 × 3.6–4.0 mm 5.1–5.2 mm See in stock
1 6.5–7.0 × 4.5–5.0 mm 6.4–6.5 mm See in stock
1.5 7.4–8.0 × 5.2–5.7 mm 7.3–7.4 mm See in stock
2 8.2–8.8 × 5.7–6.3 mm 8.1–8.2 mm See in stock
3 9.4–10.1 × 6.5–7.2 mm 9.2–9.4 mm See in stock
4 10.3–11.1 × 7.1–7.9 mm 10.2–10.3 mm See in stock
5 11.1–12.0 × 7.7–8.5 mm 10.9–11.1 mm See in stock
  • 0.5 ct
  • 1 ct
  • 1.5 ct
  • 2 ct
  • 3 ct
  • Round 1 ct

Drawn at actual size on most computer screens at 100% zoom. To compare with any other shape, or see it on your ring size: open the shape comparer.

04 · Length-to-width ratio

Choosing the ratio: taste, not a grade

Most emerald cuts fall between 1.30 and 1.60. Around 1.40 to 1.50 is the classic rectangle. Below 1.30 it starts to look square, and at 1.00 to 1.05 it becomes a square emerald (see below).

GIA gives emerald cuts no overall cut grade, so check the video for even steps and strong contrast between light and dark.

  • 1.30 Squarer
  • 1.45 Classic
  • 1.60 Long

05 · Square emerald

The square emerald: same steps, square outline

Cut to a ratio of 1.00 to 1.05, the emerald cut becomes a square emerald: the same long steps and calm flashes, in a square. It is often confused with the Asscher, which has larger cut corners and a windmill pattern.

A square emerald is the Asscher’s quieter cousin: the same steps, a flatter look and smaller corners. Like every step cut, it shows everything inside, so clarity comes first.

See square emerald diamonds in stock →

06 · Clarity and the window

What an emerald cut shows you

With its open table and long steps, an emerald cut shows inclusions a brilliant would hide, and a warm tint more easily too. That is why we start at VS2 and F–G, and always check the video.

A poorly cut one can also show a “window”: a washed-out area in the centre where light passes straight through. Bold contrast between light and dark steps is what you want.

07 · What we look for

How to choose a good emerald cut

  1. Clarity first

    VS2 or better, and check the video: inclusions under the table show.

  2. Colour, F–G

    Step cuts show warmth more than brilliants. F–G looks white; go higher in platinum if you are sensitive to warmth.

  3. Even steps

    The steps should be parallel and evenly spaced, with crisp, matching corners.

  4. Strong contrast

    Look for bold flashes of light and dark, not a flat, glassy centre.

  5. A ratio you like

    1.30 to 1.60; 1.40 to 1.50 is the classic look.

  6. Protect the corners

    Four corner prongs or a bezel keep the cut corners safe.

Natural or lab-grown? The advice is the same: an emerald cut looks the same whatever its origin. Only the price differs, so compare live prices in Canadian dollars with the switch above the stones.

Our advice

“An emerald cut doesn’t twinkle, it flashes, like light across a still pool. Choose it for that look, and spend on clarity rather than carats: its open facets hide nothing.”

Jouwell, Montreal

08 · Questions

Emerald-cut diamond questions

What is a window in an emerald-cut diamond?

A washed-out area in the centre where light passes straight through instead of reflecting back. It makes the stone look flat. Good proportions prevent it, and the video shows it.

Do emerald-cut diamonds need a higher clarity?

Yes. Their open facets show inclusions a brilliant would hide, so we start at VS2 and check every stone on video.

What is the best ratio for an emerald cut?

Taste decides. Most fall between 1.30 and 1.60, and 1.40 to 1.50 is the classic rectangle.

What is the difference between an emerald cut and an Asscher?

Both are step cuts. The emerald cut is a rectangle; the Asscher is a square with large cut corners and a windmill pattern. A square emerald sits between the two.

Is an emerald cut cheaper than a round?

Often, for natural diamonds, because less rough is lost in cutting. For lab-grown diamonds it changes with size. Compare live prices at the size you want.

What setting suits an emerald cut?

Four corner prongs or a bezel. Baguette side stones and east–west settings suit its lines; plan the wedding band early if the stone sits low.