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Asscher diamonds, lab-grown and natural

The Asscher is a square step cut with large cut corners. Cut well, it shows a windmill of squares stepping down to the centre: quiet, elegant and Art Deco.

Every Asscher we sell is certified by GIA, IGI or HRD and has a 360° video, so you can check its clarity and its windmill before you buy.

See Asscher diamonds in stock Compare with other shapes

01 · In stock now

Asscher 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 8,240 Asscher diamonds, 1–3 ct

02 · Sizes by carat

Asscher 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 Asscher, size Round, diameter
0.5 4.3–4.5 mm 5.1–5.2 mm See in stock
1 5.4–5.7 mm 6.4–6.5 mm See in stock
1.5 6.2–6.5 mm 7.3–7.4 mm See in stock
2 6.8–7.2 mm 8.1–8.2 mm See in stock
3 7.8–8.2 mm 9.2–9.4 mm See in stock
4 8.6–9.0 mm 10.2–10.3 mm See in stock
5 9.2–9.7 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.

Our advice

“When an Asscher is cut well you see a windmill of squares stepping down to the centre. It’s a quiet, elegant stone; like the emerald, put your budget into clarity.”

Jouwell, Montreal

03 · Questions

Asscher diamond questions

What size is a 1 carat Asscher diamond?

About 5.4 to 5.7 mm on each side. Like other squares, it faces up smaller than a round of the same weight.

Does an Asscher need a higher clarity?

Yes. As a step cut it shows what is inside, so we start at VS2 and F–G and check every stone on video.

Asscher or square emerald?

Both are square step cuts. The Asscher has larger cut corners and a taller, windmill look; the square emerald is flatter, with smaller corners.