Asscher Cut Diamond: The Complete Guide

An Asscher cut diamond is a square step cut whose corners are cropped so deeply that the outline reads as octagonal. The stone is built around a large, flat table, with rows of long, parallel step facets descending from the girdle on both the crown and the pavilion. Those facets meet in straight lines, and the eye drops from level to level in a repeating pattern that collectors call the hall of mirrors. The effect is depth and architecture rather than scattered sparkle, which is why the shape has always been associated with tailored, geometric design and with the clean, symmetrical lines that Art Deco jewelry made famous. Unlike a brilliant cut, which breaks light into many small flashes, the Asscher reflects light in broad, orderly bands, and the character of the stone changes with the angle of view. It is the square relative of the emerald cut, which shares the same step facets in a more elongated outline.

The cut was created in 1902 by Joseph Asscher, whose Amsterdam firm still bears the family name; Asscher later won lasting fame for cleaving the Cullinan diamond in 1908. The original cut enjoyed a quiet following through the 1920s and 1930s before demand faded, and for decades the shape appeared mostly in vintage jewelry rather than new production. It returned in the 2000s, when Art Deco-inspired design regained popularity and the Royal Asscher company introduced a modernized version with updated facet proportions. Today both square and elongated Asscher cut diamonds are cut from natural and laboratory-grown rough alike, and the shape appears across engagement rings, earrings and pendants.

The Asscher cut appeals first through character. Its stepped interior and geometric outline evoke the architecture and jewelry of the Art Deco period, and its mirror-like depth returns broad, orderly flashes of light as the stone moves. The deeply cropped corners remove the vulnerable sharp points that some square cuts carry, which makes the stone easier to set securely and less likely to chip at a corner during wear. The overall look is sophisticated, deliberate and quieter than a brilliant cut, and that restraint is exactly what draws buyers who find round or princess stones too busy. It is a shape that reads as intentional rather than as a default, and it tends to suit buyers who already know they want a geometric, vintage-leaning stone rather than maximum light performance, a preference that carries over to laboratory-grown Asschers.

The trade-offs follow from the same design. The long, open step facets reveal inclusions and body color more readily than a brilliant facet pattern, so clarity and color choices carry more weight in an Asscher than in most other shapes. The cut returns flash rather than fire, which can disappoint buyers who specifically want rainbow sparkle, and the deep pavilion holds weight beneath the girdle, so an Asscher can look smaller face-up than another square cut of the same carat weight. Finally, fewer well-cut Asscher diamonds are produced than princess or cushion cuts, which makes good stones harder to find and worth comparing patiently before buying. Buyers who understand these limits usually choose an Asscher for the design itself rather than for maximum light return, which keeps expectations aligned with the shape's strengths.

• Pros: vintage Art Deco character built on symmetry, clean lines and architectural depth rather than sparkle.
• Pros: the hall-of-mirrors interior returns broad, orderly flashes of light as the stone moves through any angle.
• Pros: deeply cropped corners are less vulnerable to chipping than the sharp points of a princess cut.
• Pros: a distinctive, recognizable outline that stands apart from round, cushion and princess cuts.
• Cons: open step facets and a wide table reveal inclusions and body color more easily than brilliant cuts do.
• Cons: limited fire, so buyers who want rainbow sparkle may prefer a radiant, round or cushion stone instead.
• Cons: the deep pavilion can make the stone look smaller face-up than its carat weight would suggest.
• Cons: fewer well-cut Asscher diamonds are produced, so the available selection is smaller than for princess cuts.

Asscher cut diamond prices follow the same forces as other shapes: carat weight, color, clarity and the quality of the cutting itself, with market demand and the yield of finished stones from rough setting the level. Because fewer Asscher cuts are produced than princess cuts, and because the shape's deep pavilion uses more rough for each face-up millimeter, an Asscher can carry a higher price per carat than a princess of comparable grade. Rather than quote figures that change with the market, Belaroq publishes the current price on every product page, where the exact stone and setting are specified, and treats that listing as the only number that matters. Cut quality is the quiet variable: two stones with the same grades can differ in how crisply their corners are cut and how evenly their steps align. The same variables drive lab-grown prices, which sit lower but move for the same reasons.

The same shape is available in laboratory-grown diamond form, where the quality scale applies identically at a more accessible price, and complete Asscher pieces exist at entry budgets. Belaroq's jewelry-under-500 collection includes finished lab-grown diamond pieces at or below US$500, an anchor that can be verified against the catalog at any time. Buyers who cannot find the exact Asscher cut diamond ring they want can commission one instead, since the Belaroq custom jewelry process takes around 30 days from design approval to delivery. In this shape, value comes from clarity and cut quality rather than from chasing the largest carat number, because a poorly cut Asscher loses the depth that justifies the shape.