Where family heritage meets modern craftsmanship

ADCO began over 40 years ago when our family entered the world of diamonds — sourcing stones, cultivating global relationships, and building a reputation for honesty and quality. Today, as sisters continuing that legacy, we bring a more personal approach to fine jewelry.

Our work blends heritage and modern design, rooted in the belief that every piece should feel meaningful, intentional, and true to the person wearing it. Whether you choose from our collection or create something custom, we’ll guide you through the process with care and expertise, making the experience as beautiful as the final piece.

The team

The two daughters (Aline and Rina) who arrived with their parents in 1975, went on to study biology and graphic design respectively at Boston University, when they too were drawn ineluctably to diamonds. After graduating from BU, they both enrolled at the Gemological Institute of America in Santa Monica, California before joining the family business. Combining backgrounds in science and art, Aline and Rina speak with authority and creativity on all aspects of jewelry creation.

With Aline and Rina on board, ADCO’s wholesale business evolved into the retail business it is today. Still operating as a family business, ADCO has established itself as a reputable retailer in Boston that has exponentially grown its clientele. Beyond specializing in loose diamonds for engagement rings, wedding bands, and all other precious gems, ADCO has branched out into custom jewelry design.