Lab-Grown Diamond Engagement Ring

When light catches the elongated silhouette of an 8 x 4 mm marquise diamond, it traces a subtle arc of brilliance that feels both bold and refined. This semi-set engagement ring offers a sleek foundation in 18K rose gold, designed to cradle your chosen center stone with precision and understated elegance.

The band’s low-profile setting ensures the ring sits close to the finger, minimizing snagging and enhancing comfort for everyday wear. Crafted with meticulous attention in our Williamsburg studio, the smooth finish and secure prong arrangement balance durability with delicate craftsmanship.

Each lab-grown diamond reflects a commitment to ethical sourcing and sustainability, offering clarity and sparkle without compromise. The marquise shape’s tapered points elongate the hand, making this mounting ideal for those who appreciate architectural lines paired with subtle drama.

Its streamlined design complements stacking with other bands or stands confidently alone, fitting comfortably beneath gloves or daily accessories. Should you need resizing, our in-studio experts handle adjustments with care to maintain the ring’s integrity.

Explore this semi-set marquise 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 made for daily life and lasting beauty.

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.