Market Street Diamonds

Market Street Diamonds is a luxury jewelry store in Washington, DC, specializing in custom engagement rings, fine diamond jewelry, and bespoke watch services. Located in the historic Georgetown neighborhood, the store serves clients seeking heirloom-quality pieces with personalized design, offering services such as in-house jewelry and watch repair, gemological evaluations, diamond appraisals, and estate jewelry buybacks. With a 4.80 rating based on customer reviews, the business is recognized for its craftsmanship, attention to detail, and commitment to ethical sourcing, including conflict-free diamonds and GIA-certified gemstones. The store serves the greater Washington, DC area, including nearby communities in Maryland.

Since 1906, Market Street Diamonds has operated as a full-service jewelry studio, maintaining an in-house team of skilled artisans and GIA-certified gemologists led by Chief Gemologist Dino Lonzano. The company is the only diamond cutter in the mid-Atlantic region, offering precision cutting and custom design from concept to completion. Its signature collections include the Heritage Collection, Dino Lonzano Solitaires, and the Greek Life and American Anthology lines, all crafted with a focus on timeless design and natural stone beauty. The store also provides exclusive services such as the Forever Care & Share Program, lab-grown diamond options, and a dedicated bridal design experience, emphasizing collaboration and storytelling in every piece.

Situated at 2512 Pennsylvania Ave NW in Georgetown, the business lies just a short walk from the M Street Bridge and is bordered by K Street Northwest and L Street Northwest, both major thoroughfares. The location places it within easy reach of the Foggy Bottom Metro station and the city’s central government district, blending historic charm with modern accessibility.

Market Street Diamonds stands among the most trusted names in Washington, DC’s jewelry scene, known for its century-long legacy, expert craftsmanship, and comprehensive in-house services. The business’s reputation is built on decades of client trust, a strong commitment to quality, and a rare combination of design innovation and technical mastery.

As a cornerstone of Georgetown’s luxury retail landscape, Market Street Diamonds continues to define excellence in fine jewelry and watchmaking in the nation’s capital.