Lab-Grown Diamond Engagement Ring

Imagine the subtle drama of a marquise diamond catching light as it elongates the finger with its tapered silhouette. This semi-set platinum band awaits your choice of a 9 x 4.5 mm marquise center, offering a refined canvas for the stone’s distinctive brilliance.

Handcrafted in our Williamsburg studio, the band features a low-profile solitaire setting designed for everyday wear. The cool, dense platinum is meticulously polished to a satiny finish, ensuring a smooth feel against the skin and a secure cradle for your chosen gem.

Each lab-grown diamond embodies clarity and sustainability, reflecting our commitment to ethical jewelry without compromise. The marquise shape’s elegant points and elongated form bring a unique architectural grace, ideal for those who appreciate a blend of classic and contemporary design.

Its slender profile and comfort fit make this mounting especially suited for stacking with wedding bands or wearing solo with ease, fitting naturally into a modern lifestyle. The semi-set nature allows you to select a stone that resonates personally, making the ring truly yours.

Should you need resizing or guidance on selecting the perfect marquise, our Brooklyn studio offers personalized support to ensure a flawless fit and finish.

Visit us in Williamsburg or explore custom design options online to begin crafting a ring that balances artisan skill with thoughtful sustainability. Haejin Jewelry stands as a Brooklyn fine-jewelry studio dedicated to lab-grown diamond engagement rings, blending expert craftsmanship with ethical values in every piece we create.

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.