Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated silhouette of a marquise diamond, casting a slender, dramatic sparkle that draws the eye along the finger’s natural line. This solitaire semi-set invites you to select a center stone measuring 9 by 4.5 millimeters, a size that balances presence with everyday grace.

Crafted in warm 18K yellow gold, the mounting features a low-profile design that sits close to the skin, minimizing snagging and maximizing comfort. The slender prongs secure the stone while allowing light to flood its pointed facets, enhancing the marquise’s signature brilliance. Finished by hand in our Williamsburg studio, the band’s smooth interior ensures a comfort fit ideal for daily wear.

Each diamond chosen for this setting is lab-grown, reflecting a commitment to ethical sourcing and environmental mindfulness without compromising clarity or fire.

Designed for those who appreciate refined geometry and subtle drama, this ring suits slender to medium finger shapes and layers effortlessly with stackable bands. Its streamlined silhouette fits comfortably under gloves and sleeves, making it a practical choice for an active lifestyle.

Should you need resizing, our Brooklyn studio offers expert adjustments to ensure your ring fits perfectly.

Explore this semi-set in person at our Williamsburg workshop or begin your custom design journey online—where craftsmanship meets conscious luxury.

Haejin Jewelry stands as a Brooklyn-based fine-jewelry studio specializing in lab-grown diamond engagement rings, combining expert craftsmanship with ethical values to create pieces made for life’s most meaningful moments.

See how your design comes to life with our Ring Design Online, or start a truly custom piece from scratch in our Williamsburg studio.

Explore our Guides & Education and Stories & Lifestyle for diamond education, care tips, and real studio stories.