Lab-Grown Diamond Engagement Ring

The elongated silhouette of the marquise diamond, measuring 12 by 6 millimeters, draws the eye with its tapered points and graceful sweep—an elegant statement poised for everyday wear. This semi-set solitaire ring features an 18K yellow gold band crafted for a low-profile fit that rests close to the finger, minimizing snagging while maximizing comfort.

Each band is hand-finished in our Williamsburg studio, with precise prong settings designed to cradle your chosen marquise stone securely without excess height. The smooth interior ensures a comfort fit that feels natural from morning coffee to evening gatherings.

Our commitment to sustainability is reflected in the exclusive use of lab-grown diamonds, offering clarity and brilliance with a significantly reduced environmental footprint.

This design suits those who appreciate refined geometry and a sleek silhouette, ideal for slender or average finger sizes. Its modest profile pairs effortlessly with stacking bands or a wedding ring, while the solitaire style keeps the focus on the diamond’s distinctive shape.

Should you need resizing, our Brooklyn studio provides expert adjustments to ensure your ring fits perfectly without compromising its structural integrity.

Explore this semi-set marquise solitaire in person at our Williamsburg workshop or begin your custom design journey online—crafted for your life, made in Brooklyn.

Haejin Jewelry stands as a Brooklyn-based fine-jewelry studio specializing in lab-grown diamond engagement rings, blending expert craftsmanship with ethical sourcing and a modern design ethos rooted in New York City.

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.