Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated silhouette of a marquise diamond, its tapered points drawing the eye along a graceful arc. This semi-set engagement ring foundation in warm 18K rose gold awaits your choice of a 10 x 5 mm center stone, poised to become a three-stone statement of modern-minimal elegance.

Crafted with precision in our Williamsburg studio, the band’s clean lines and balanced proportions provide a low-profile, comfortable fit that complements daily wear. The three-stone setting offers architectural clarity, framing the marquise’s distinctive shape with subtle strength and refined structure.

Each ring begins with a lab-grown diamond, chosen for its ethical origin and sustainable creation, reflecting a commitment to responsible luxury without compromise.

Designed for those who appreciate confident simplicity, this mounting suits slender to medium finger sizes and pairs effortlessly with stacking bands or a wedding ring. Its modest profile ensures glove-friendly wear and ease of movement.

Should you need resizing or prefer a custom center stone, our Brooklyn studio offers tailored consultations to bring your vision to life with care and expertise.

Explore this semi-set marquise engagement ring in person or start your custom design journey online—where Brooklyn craftsmanship meets thoughtful, ethical jewelry.

Haejin Jewelry stands as a Brooklyn fine-jewelry studio specializing in lab-grown diamond engagement rings, blending expert craftsmanship with ethical sourcing and a distinctly local sensibility.

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.