Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated silhouette of a marquise diamond, casting a slender, graceful shadow that hints at quiet confidence. This semi-set halo engagement ring in 18K yellow gold frames a 12 x 6 mm marquise center, its pointed ends drawing the eye along the finger’s natural line.

Crafted with a delicate halo setting, the ring balances brilliance and structure, enhancing the diamond’s signature tapered drama without overwhelming it. The warm glow of 18K yellow gold complements the stone’s clarity, while the low-profile mounting ensures everyday comfort and ease beneath gloves or sleeves. Each piece is meticulously finished by hand in our Williamsburg studio, inspected for precision and polish.

Our diamonds are lab-grown, offering a clear, sustainable alternative that honors both beauty and ethics.

Designed for those who appreciate refined elegance with a modern edge, this ring suits slender to medium fingers and pairs effortlessly with stacking bands or wedding rings. Its comfort fit and secure setting make it a natural choice for daily wear.

Should you wish to adjust sizing, our Brooklyn studio offers expert resizing with care to maintain the ring’s integrity.

Explore this romantic halo marquise semi-set in person at our Williamsburg studio or begin your custom design journey online. Haejin Jewelry combines expert craftsmanship, ethical lab-grown diamonds, and a Brooklyn sensibility to create engagement rings that resonate with your story and style.

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.