Lab-Grown Diamond Engagement Ring

When light catches the elongated silhouette of a 12 x 6 mm marquise diamond, it reveals a striking balance of tapered drama and refined elegance. This semi-set halo engagement ring in 18K white gold offers a low-profile setting that nestles close to the finger, designed for everyday wear without compromising presence.

Crafted in Williamsburg, Brooklyn, the band is meticulously finished with a comfort fit that smooths the inner curve for effortless all-day wear. The halo setting enhances the marquise’s pointed shape, amplifying its brilliance while maintaining a sleek, unobtrusive profile. Each piece undergoes thorough inspection to ensure precision and durability.

Our commitment to ethical jewelry is reflected in the use of a lab-grown diamond, combining clarity and sustainability with a smaller environmental footprint.

This ring suits those who appreciate architectural lines paired with subtle sparkle—ideal for hands that favor elongated shapes or for stacking alongside simpler bands. Its streamlined design fits comfortably under gloves and layers well without catching.

Should you need resizing, our Brooklyn studio offers expert adjustments to ensure a perfect fit without delay.

Explore this semi-set halo marquise ring in person at our Williamsburg studio or begin your custom design journey online, where thoughtful craftsmanship meets modern romance.

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 deep connection to 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.