Asscher cut diamonds are experiencing a resurgence among San Diego couples seeking a distinctive center stone for custom engagement rings, according to Carl Blackburn of C. Blackburn Jewelers in La Jolla. The cut, characterized by its square shape with deeply clipped corners and broad step facets, creates a repeating pattern of light and dark known as the "hall of mirrors" effect, offering a more measured sparkle than the rapid brilliance of a round cut.
Blackburn notes growing demand for Asscher cuts from clients who desire a ring with historical character but not necessarily an antique design. "An Asscher cut gives the entire ring a clear sense of structure," Blackburn said. "Its proportions and faceting can guide every other decision, from the side stones and prongs to the metal, gallery and band." This structural clarity allows for a highly personalized design process, as Blackburn begins by studying the center diamond rather than applying a predetermined setting. The stone's outline, corner proportions, table, depth, and reflection pattern all inform the surrounding design. Because the Asscher's large, open facets make its interior especially visible, clarity and precise cutting are paramount.
The choice of side stones can either extend or contrast with the center diamond's geometry. Step-cut side diamonds continue the long, orderly reflections, while tapered baguettes or trapezoids create a gradual transition to a narrower shank. Brilliant-cut accents introduce a livelier sparkle. Metal selection further alters the Asscher's character: white gold or platinum blends with a colorless diamond and emphasizes clean Art Deco geometry, whereas yellow gold provides a warmer frame that accentuates the clipped corners and moves away from the expected cool palette. Engraving adds softness, and a restrained band can give a contemporary, minimalist look.
Prongs and the structure beneath the diamond receive equal attention. The setting must protect the clipped corners without obscuring the outline that makes the cut recognizable. An open gallery prevents a substantial center stone from appearing heavy in profile, while hidden diamonds or hand-finished metalwork add subtle detail visible only from the side.
The Asscher cut traces its history to Amsterdam in 1902, when diamond cutter Joseph Asscher developed and patented the original design. Its 58 facets, high crown, small table, deep pavilion, and cut corners distinguished it from other shapes of the period. The cut became fashionable during the Art Deco era of the 1920s and 1930s, when its symmetry and stepped forms fit naturally with the architecture and fashion of the time. Its popularity later receded as brilliant cuts dominated the market. Interest returned near the end of the 20th century as collectors and couples rediscovered vintage jewelry and geometric shapes. In 2001, the Asscher family introduced the patented Royal Asscher Cut, adding 16 facets to the original arrangement for a total of 74 while retaining the distinctive clipped-square form.
More than a century after its creation, the Asscher cut continues to move easily between historical and modern design. Blackburn believes that adaptability helps account for its renewed popularity among couples who want something recognizable but less conventional than the most common engagement-ring styles. "The cut brings its own history and personality, but it does not dictate what the finished ring has to be," Blackburn said. "That leaves room to create something personal rather than simply reproduce a period style." For those interested in a custom engagement ring, C. Blackburn Jewelers can be reached at 858-251-3006 or by texting Carl Blackburn at 619-723-8589.
