Lab-Grown Diamond Engagement Ring

When light catches the elongated silhouette of a marquise diamond, it creates a striking interplay of brilliance and shadow that draws the eye along the finger’s natural line. This semi-set three-stone engagement ring foundation in polished platinum offers a sleek, low-profile frame designed to cradle a 6 x 3 mm marquise center stone with precision.

Each band is hand-finished in our Williamsburg studio, where the platinum’s cool weight is shaped for comfort and durability. The three-stone setting balances architectural grace with everyday wearability, its secure prongs refined to minimize snagging while showcasing the diamond’s tapered drama.

Crafted with lab-grown diamonds, this ring reflects a commitment to ethical sourcing and environmental mindfulness without compromising on clarity or fire.

Its slender silhouette suits those who appreciate a refined statement that layers effortlessly with wedding bands or stackable rings. The low-profile design ensures it slips easily under gloves or sleeves, ideal for daily life in Brooklyn’s vibrant rhythm.

Should you wish to adjust sizing, our in-studio experts handle resizing with care to maintain the ring’s structural integrity and finish.

Explore this semi-set foundation in person at our Williamsburg workshop or begin your custom design journey online, where expert guidance meets artisan craft.

Haejin Jewelry stands as a Brooklyn-based fine-jewelry studio specializing in lab-grown diamond engagement rings, where ethical craftsmanship and local expertise shape every piece with intention and care.

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.