Lab-Grown Diamond Engagement Ring

When light catches the elongated silhouette of a marquise diamond, it carves a striking, confident line across the finger—an emblem of modern-minimal elegance. This semi-set engagement ring in 18K white gold offers a refined framework ready to showcase a 9 x 4.5 mm marquise center stone, accented delicately to enhance its architectural clarity.

Crafted with precision in Williamsburg, the band’s sleek profile balances durability with comfort, designed to sit low and smooth for everyday wear. The accents are carefully placed to complement the marquise’s tapered drama without overwhelming its clean geometry, finished with a polished surface that reflects Brooklyn’s artisanal spirit.

Each diamond is lab-grown, ensuring a transparent origin and a reduced environmental footprint, aligning with a quiet commitment to ethical jewelry. The ring’s streamlined shape suits those who appreciate a contemporary aesthetic that pairs effortlessly with stacking bands or stands alone as a statement of subtle sophistication.

Resizing is available through our Brooklyn studio, where every adjustment maintains the integrity of the setting and metalwork. Lead times vary depending on customization but are communicated clearly to honor your timeline.

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

Haejin Jewelry is a Brooklyn-based fine-jewelry studio specializing in lab-grown diamond engagement rings, blending ethical craftsmanship with local expertise to create pieces that resonate with modern love stories.

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.

Finished for daily wear — a low-profile silhouette and polished edges help minimize snagging.