For couples shopping for an engagement ring, the choice often comes down to a recognizable designer brand like Tiffany, Cartier, or Tacori, or a custom piece built from scratch. According to Carl Blackburn, owner of C. Blackburn Jewelers in La Jolla, California, the decision hinges on how much of the price tag goes toward the label versus the diamond and craftsmanship.
“Sometimes a client just loves that a ring is a Tiffany, and that is a fine reason to buy it,” Blackburn said. “But most of the time, what they actually love is the look—and once you separate those two things, custom starts to make a lot more sense.”
Blackburn, a second-generation jeweler with over 30 years of experience, says custom work is not about copying a designer ring but identifying what draws the client—such as a vintage detail, a halo setting, or the overall silhouette—and creating a new design around those elements. A halo can be made more delicate, a setting lowered for everyday wear, or the center stone changed to another shape.
To address the worry that a custom ring may not match expectations, Blackburn’s studio uses a detailed design process. After an initial consultation and selection of gemstone and metal, a three-dimensional CAD model is created. Clients can view it from every angle, request revisions, and approve a full-size resin prototype to try on before the ring is cast. “The resin model is really where the guesswork disappears,” Blackburn said. “You put it on your hand and you know.”
The economics of custom work can be significant. For a natural diamond of comparable grading and size, Blackburn says buyers often spend approximately 15% to 30% less than at a designer boutique or traditional retailer. On stones weighing two carats or more, the difference can amount to several thousand dollars. Lab-grown diamonds can change the budget even more dramatically: at C. Blackburn Jewelers, a lab-grown diamond of similar size and quality commonly costs only 5% as much as its natural counterpart, allowing clients to choose a larger center stone, upgrade to platinum, or add hand engraving.
“Custom should not be thought of as the bargain version of a designer ring,” Blackburn said. “The better question is what you receive for the same total investment. With custom, a larger share can often go toward the diamond, the materials, and the work itself.”
Custom design also allows flexibility for projects outside designer boutique offerings, such as incorporating stones from family heirlooms, reconstructing damaged pieces from photographs, or transforming an antique ring into a coordinated bridal set. As an appointment-only studio, C. Blackburn Jewelers gives clients direct access to the designer, and the business maintains a 5.0-star rating on both Google and Yelp.
For Blackburn, neither option is universally better. A designer ring may be worth the premium when the brand and signature design are central to its appeal. A custom ring becomes more compelling when the client values individuality, control over details, and the ability to direct more of the budget toward the ring itself.
