What is an Asscher cut diamond?
By Jared James · Last updated 21 May 2026
Definition
The Asscher cut is a square step-cut diamond with cropped corners that give it an octagonal outline, developed by the Royal Asscher Diamond Company in Amsterdam in 1902. It has between 50 and 58 large step facets and a high crown, which together create a distinctive hall-of-mirrors effect where concentric squares of light seem to recede into the stone's depths. It was particularly fashionable in the Art Deco period, and there has been a strong revival in interest since the early 2000s.
Frequently asked questions
- What is the difference between an Asscher cut and an emerald cut?
- Both are step cuts with a similar hall-of-mirrors appearance, but the Asscher cut is nearly square while the emerald cut is rectangular. The Asscher also has a higher crown and more pronounced cropped corners, giving it a slightly more enclosed, geometric look.
- Does an Asscher cut show inclusions easily?
- Step cuts in general show inclusions more readily than brilliant cuts because the open facets act like windows into the stone. For an Asscher cut, it is worth prioritising clarity, with VS2 or better being a common recommendation.
- What is the Royal Asscher cut?
- The Royal Asscher cut is an updated version developed by the Asscher family in 2001, featuring 74 facets compared to the original 58. The extra facets give it more brilliance while keeping the characteristic square, step-cut look.
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