Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated silhouette of a marquise diamond, casting a slender, graceful shadow across your hand. This semi-set engagement ring invites you to choose a 6 x 3 mm marquise stone, whose tapered points evoke a quiet drama and elongate the finger with refined elegance.

Crafted in warm 18K yellow gold, the slender band is polished to a soft glow, designed for everyday wear with a low-profile setting that nestles close to the skin. The mounting’s delicate prongs hold the stone securely while allowing light to flood the facets, enhancing the diamond’s signature brilliance without excess height.

Each ring is finished by hand in our Williamsburg studio, where precision meets a tactile comfort fit that feels natural from morning coffee to evening strolls. The semi-set design offers a thoughtful foundation for your chosen marquise, blending personal choice with expert craftsmanship.

Our commitment to sustainability is reflected in the exclusive use of lab-grown diamonds, ensuring clarity and ethical integrity without compromise.

This ring suits those who appreciate a slender, elegant profile that layers beautifully with wedding bands or stackable rings. Its subtle presence pairs well with slender fingers or those seeking a refined statement that remains understated.

Should you need resizing or guidance on selecting the ideal marquise cut, our Brooklyn studio offers personalized consultations to ensure a seamless experience.

Discover the possibilities in person at our Williamsburg atelier or begin your custom design journey online—where craftsmanship and care meet your vision.

Haejin Jewelry stands as 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.