Lab-Grown Diamond Engagement Ring

Imagine the subtle drama of a marquise diamond catching light as it elongates the finger with its tapered silhouette—an invitation to quiet elegance. This semi-set platinum band awaits your choice of an 8 x 4 mm marquise center, designed with delicate accent stones that frame the main gem in a refined artisan setting.

Crafted in our Williamsburg studio, the platinum band is polished to a soft sheen, offering a cool, substantial feel against the skin. The low-profile mounting ensures the ring sits comfortably beneath gloves or daily wear, while the accent stones are meticulously set to enhance sparkle without overwhelming the center.

Each lab-grown diamond option reflects a commitment to ethical sourcing and sustainability, providing clarity and brilliance with a lighter environmental footprint.

Ideal for those who appreciate a slender, elongated shape that complements narrow fingers or adds length to the hand, this design balances statement with subtlety. The semi-set format invites personalization, allowing you to select a marquise stone that resonates with your vision.

Should you need resizing or guidance on stone selection, our Brooklyn studio offers expert consultation with thoughtful care and timely craftsmanship.

Explore this semi-set marquise engagement ring in person at our Williamsburg workshop or begin your custom design journey online—where ethical artistry meets modern romance.

Haejin Jewelry stands as a Brooklyn-based fine-jewelry studio specializing in lab-grown diamond engagement rings, blending expert craftsmanship with sustainable practices and a deep connection to New York City’s artisan spirit.

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.