Lab-Grown Diamond Engagement Ring

When sunlight catches the elongated curves of a marquise diamond, it casts a slender, luminous silhouette that seems to dance with quiet elegance. This semi-set solitaire ring invites you to choose your own 8 x 4 mm marquise center, a shape known for its graceful taper and subtle drama.

Crafted in warm 14K yellow gold, the mounting balances classic warmth with a refined profile that sits close to the finger, offering a comfortable, low-profile wear. The slender band’s smooth finish and secure prong setting ensure daily ease without sacrificing the diamond’s striking presence.

Each piece reflects our commitment to ethical jewelry, featuring lab-grown diamonds that deliver clarity and brilliance with a smaller environmental footprint. This ring suits those who appreciate a blend of vintage-inspired romance and modern craftsmanship, especially flattering on slender fingers or when paired with stackable bands.

Should you need resizing or prefer a custom design consultation, our Williamsburg studio offers a pressure-free experience tailored to your vision. Lead times are transparent, with attentive care from design to delivery.

Explore this semi-set marquise solitaire in person or begin your custom design journey online—where Brooklyn’s artisanal spirit meets thoughtful, sustainable luxury.

Haejin Jewelry stands as a Brooklyn-based fine-jewelry studio specializing in lab-grown diamond engagement rings, where expert craftsmanship and ethical sourcing come together in every bespoke creation.

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.