Lab-Grown Diamond Engagement Ring

When light catches the elongated silhouette of a marquise diamond, it draws the eye along a graceful arc—an elegant statement of refined drama. This semi-set engagement ring foundation, crafted in 18K white gold, offers a sleek, low-profile frame designed to showcase a 9 x 4.5 mm marquise center stone with subtle accent settings that enhance brilliance without bulk.

Each band is meticulously shaped for comfort, with a smooth inner surface that rests naturally against the finger, making it ideal for everyday wear. The setting’s precision ensures the stone sits securely while maintaining a streamlined profile that slips easily beneath gloves or sleeves.

Our commitment to sustainability is reflected in the exclusive use of lab-grown diamonds, combining clarity and ethical sourcing without compromise.

This mounting suits those who appreciate architectural elegance paired with practical design—especially hands that favor elongated shapes or a ring that layers seamlessly with wedding bands or stackable accents.

Should you need a custom fit, resizing is handled expertly in-studio to preserve the ring’s integrity and comfort.

Explore this semi-set marquise ring in our Williamsburg studio or begin your custom design journey online, where expert guidance meets Brooklyn craftsmanship.

Haejin Jewelry stands as a Brooklyn-based fine-jewelry studio specializing in lab-grown diamond engagement rings, blending ethical craftsmanship with expert design rooted in New York City’s creative spirit.

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.