Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated silhouette of a marquise diamond, its tapered points drawing the eye along a graceful arc. This semi-set three-stone mounting in 18K white gold offers a refined foundation for a 6 x 3 mm marquise center, designed to showcase the stone’s dramatic, vintage-inspired profile.

Each band is hand-formed in our Williamsburg studio, with a low-profile setting that balances presence and practicality. The three-stone arrangement is meticulously crafted to sit comfortably against the finger, its smooth shank polished to a satin finish that resists daily wear. The prongs are precisely aligned to secure your chosen diamond while allowing maximum light to enter, enhancing brilliance without bulk.

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

This ring suits those who appreciate architectural elegance with a subtle edge—ideal for slender fingers or as a statement piece in a stack. Its low profile and smooth contours make it glove-friendly and comfortable for everyday wear.

Should you need resizing, our in-house artisans adjust the band with care to maintain structural integrity and finish.

Explore this semi-set marquise three-stone ring in person at our Williamsburg studio or begin your custom design journey online, where expert guidance awaits.

Haejin Jewelry stands as a Brooklyn-based fine-jewelry studio specializing in lab-grown diamond engagement rings, blending expert craftsmanship with ethical materials and a local, hands-on approach to custom 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.