Lab-Grown Diamond Engagement Ring

Imagine the subtle drama of a marquise diamond catching light as it elongates the finger with a refined silhouette. This semi-set platinum mounting awaits your choice of a 12 x 6 mm marquise center, designed to showcase the stone’s tapered points with architectural grace.

Crafted in solid platinum, the band offers a low-profile setting that sits close to the finger, balancing presence with everyday comfort. Its sleek, polished finish and secure prong arrangement ensure durability without bulk, ideal for daily wear and stacking alongside other bands.

Each piece reflects our commitment to ethical jewelry, featuring lab-grown diamonds that deliver clarity and brilliance while minimizing environmental impact.

The slender shape and modest height of this solitaire mounting suit hands seeking elegance without excess—glove-friendly and unobtrusive, it complements both minimalist and layered styles.

Should you need resizing, our Brooklyn studio provides precise adjustments to ensure a perfect fit without compromising the setting’s integrity.

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

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

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.