Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated silhouette of a marquise diamond, its tapered points drawing the eye along the finger with subtle drama. This semi-set engagement ring foundation in 18K yellow gold offers a low-profile setting designed for everyday grace, crafted to sit comfortably beneath gloves or alongside stackable bands.

Each curve of the band is hand-finished in our Williamsburg studio, ensuring a smooth comfort fit that balances durability with refined elegance. The mounting’s precise prongs cradle a 7 x 3.5 mm marquise center stone, ready to showcase your chosen lab-grown diamond with secure, understated support.

Our commitment to sustainability is reflected in the ethical clarity of lab-grown diamonds, reducing environmental impact without compromising brilliance or character.

Ideal for those who appreciate architectural lines paired with practical wearability, this ring foundation complements slender to medium finger shapes and adapts seamlessly to daily life.

Should you need resizing or custom adjustments, our Brooklyn studio offers expert care with attentive timing to suit your schedule.

Explore this semi-set marquise ring in person at our Williamsburg workshop or begin your custom design journey online, where expert guidance awaits.

Haejin Jewelry stands as a Brooklyn-based fine-jewelry studio specializing in lab-grown diamond engagement rings, blending ethical craftsmanship with local expertise 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.