Lab-Grown Diamond Engagement Ring

Light catches the elongated points of the marquise diamond, casting a slender, dramatic silhouette across the hand. This semi-set platinum mounting awaits your choice of an 8 x 4 mm marquise center, designed to showcase the stone’s tapered brilliance with architectural precision.

Crafted in platinum for enduring strength and a cool, luminous finish, the setting features a low-profile design that sits close to the finger, minimizing snagging and maximizing comfort. Its secure prong arrangement balances protection with visibility, allowing light to flood the diamond’s facets while ensuring daily wearability.

Each piece reflects a commitment to ethical sourcing through lab-grown diamonds, reducing environmental impact without compromising clarity or fire. The streamlined band’s subtle weight and smooth interior contour offer a comfort fit ideal for those who prefer understated elegance that endures.

This mounting suits hands that appreciate refined geometry and a ring that layers effortlessly with wedding bands or stackable styles. Its modest height and secure setting make it glove-friendly and practical for everyday life.

Should you need resizing, our Brooklyn studio provides precise adjustments to ensure a perfect fit without disrupting the ring’s clean lines. Typical lead times accommodate thoughtful customization without rush.

Explore this semi-set marquise solitaire in our Williamsburg studio or begin your custom design journey online, where expert guidance meets personal expression.

Haejin Jewelry stands as a Brooklyn-based fine-jewelry studio specializing in lab-grown diamond engagement rings, blending expert craftsmanship with ethical clarity and local authenticity.

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.