Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated points of a marquise diamond, casting a slender, dramatic silhouette that seems to dance with every movement. This halo setting frames the 6 x 3.5 mm lab-grown marquise with a delicate circle of pavé diamonds, amplifying its fiery sparkle while maintaining a refined profile.

Crafted in cool, polished platinum, the band offers a subtle heft and a smooth comfort fit that settles naturally against the finger. The low-profile halo setting balances presence with practicality, designed for daily wear without catching or discomfort. Each ring is meticulously finished and inspected in our Williamsburg studio, where artisan hands ensure every prong and pavé bead is precisely placed.

Our lab-grown diamonds provide a clarity and brilliance that mirror mined stones, with a fraction of the environmental impact—an ethical choice that quietly honors both beauty and responsibility.

The slender marquise shape elegantly elongates the finger, ideal for those who appreciate a bold yet graceful statement. Its halo setting complements stacking with other bands or wearing solo, while the platinum’s durability suits an active lifestyle.

Should you need resizing, our in-house jewelers accommodate adjustments with care to preserve the ring’s integrity and balance.

Visit our Williamsburg studio to experience this ring firsthand or begin your custom design journey online—crafted for the moments that matter.

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

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.