Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated silhouette of a marquise diamond, casting a slender, confident shadow across the hand. This semi-set engagement ring invites you to select a center stone that balances bold geometry with graceful refinement.

Crafted in warm 18K rose gold, the band’s clean lines and subtle accents frame the marquise shape without distraction. The low-profile setting ensures the ring sits comfortably for daily wear, while the polished finish reflects Brooklyn’s artisanal spirit. Each piece is meticulously inspected in-studio to meet exacting standards of craftsmanship.

Our lab-grown diamonds offer the same optical brilliance as mined stones, with a fraction of the environmental impact—an ethical choice that aligns with mindful modern love.

Designed for those who appreciate architectural clarity and understated elegance, this ring complements slender fingers and pairs effortlessly with stackable bands. Its smooth shank and modest height make it glove-friendly and ideal for everyday life.

Should you need resizing or prefer a custom accent arrangement, our Williamsburg studio welcomes your questions with thoughtful guidance and no pressure.

Explore this semi-set marquise ring in person or begin your custom design journey online. Haejin Jewelry is a Brooklyn-based fine-jewelry studio specializing in lab-grown diamond engagement rings, blending expert craftsmanship with ethical sourcing and a local, personalized approach to design.

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.