Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated marquise diamond, casting a delicate, tapered glow that seems to stretch beyond the finger. This halo setting cradles the 6 x 3.5 mm lab-grown stone in a platinum embrace, where tiny pavé diamonds trace a luminous frame, amplifying its slender silhouette.

Crafted in Williamsburg, the ring’s low-profile halo setting balances sparkle with everyday wearability, while the cool weight of platinum offers a smooth comfort fit that settles naturally against the skin. Each facet is meticulously polished and inspected in-studio to ensure a refined finish that endures daily life.

Our lab-grown diamond embodies clarity and brilliance without compromise, reflecting a commitment to ethical jewelry that respects both earth and artisan.

Designed for those who appreciate subtle drama and romantic geometry, this engagement ring complements slender fingers and pairs effortlessly with stacking bands or a wedding band of your choice. Its streamlined profile slips easily beneath gloves or sleeves, making it an elegant companion from morning light to evening glow.

Should you need a custom fit, resizing is available to ensure the ring feels as personal as the promise it represents.

Visit our Williamsburg studio to experience this halo marquise ring firsthand or begin your custom design journey online—where craftsmanship meets intention in every detail.

Haejin Jewelry stands as a Brooklyn fine-jewelry studio dedicated to 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.