The Asscher cut is one of the most architecturally distinctive diamond shapes available — and one of the most misunderstood. Most buyers either haven't heard of it or assume it's simply "a square diamond." It's more interesting than that. If you're drawn to geometric jewelry, vintage aesthetics, or want an engagement ring that looks completely different from every other ring at the dinner table, this guide is for you.
What Is the Asscher Cut?
The Asscher cut is a square step-cut diamond with deeply cropped corners, patented in 1902 by the Royal Asscher Diamond Company of Amsterdam. It features a square table (the flat top surface) with a series of concentric, parallel step-cut facets running down to the pavilion (bottom).
The result is a diamond that looks like a series of staircases descending into a mirrored hall — sometimes called the "hall of mirrors" effect. Unlike round or oval brilliants that scatter light in all directions, an Asscher creates long, parallel flashes of light that emphasize depth and geometric precision over sparkle.
Asscher vs. Other Diamond Cuts
| Cut | Light Return | Visual Character | Vintage Feel |
|---|---|---|---|
| Asscher | Step-cut: fewer, longer flashes | Geometric, architectural, "Art Deco" | Strong — originated in 1902 |
| Round Brilliant | Maximum brilliance: 57 facets scattering light | Classic, maximum sparkle | Neutral — timeless rather than vintage-specific |
| Emerald Cut | Step-cut: similar to Asscher | Rectangular, elongated, similar hall-of-mirrors | Strong — also Art Deco period |
| Oval | High brilliance | Elongated, modern, finger-lengthening | Weak — more contemporary |
The Clarity Requirement
This is the most important practical consideration for Asscher cuts: because the step-cut faceting creates large, open "windows" into the stone, inclusions are more visible in an Asscher than in a comparable brilliant cut.
A round brilliant at SI1 clarity might appear completely eye-clean because its 57 facets scatter light across the inclusions. An Asscher at SI1 can show inclusions plainly visible to the naked eye because the step-cut facets don't hide them.
Minimum recommended clarity for Asscher cuts: VS2. For a truly clean-looking Asscher, VS1 or VVS2 is preferable. This is why Asscher rings tend to run slightly more expensive than brilliant cuts of equivalent weight — you're essentially paying for a higher clarity grade to achieve the same eye-clean appearance.
The History: Art Deco's Favorite Diamond
The Asscher cut was created at the height of the Art Deco movement and became the defining diamond of that era's jewelry. Art Deco prized geometric precision, sharp lines, and architectural forms over natural or organic shapes — the Asscher embodied all of it. Pieces from the 1920s and 1930s featuring Asscher diamonds are among the most collectible vintage jewelry today.
The cut experienced a major revival in the early 2000s (Carrie Bradshaw's "Sex and the City" engagement ring introduced it to a new generation) and has remained consistently popular since.
Who Should Choose an Asscher Cut?
- Buyers who prefer Art Deco, vintage, or architectural aesthetic over traditional sparkle
- Those who want an engagement ring that is genuinely distinctive — Asscher cuts are far less common than round brilliants
- People with long, slender fingers (the square shape flatters elongated hands)
- Buyers who appreciate depth and geometric beauty over maximum light return
Bornreal offers Asscher cut lab-grown diamond engagement rings in 925 silver, 10K, 14K, and 18K gold. Explore our engagement ring collection or contact us for a custom Asscher cut quote.