Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated points of a marquise diamond, casting a delicate, tapered glow that seems to stretch the hand with quiet elegance. This halo setting frames a 10 x 5 mm lab-grown marquise diamond in polished platinum, where each prong is meticulously shaped and hand-finished in our Williamsburg studio to cradle the stone securely while maximizing light reflection.

The low-profile halo enhances brilliance without adding bulk, allowing the ring to sit comfortably beneath gloves or alongside other bands. Crafted with a comfort-fit shank, the platinum band balances durability with a smooth feel against the skin, designed for daily wear and subtle sophistication.

Our lab-grown diamond offers a clarity and sparkle indistinguishable from mined stones, created with a commitment to sustainability and ethical sourcing that quietly honors your values.

Ideal for those who appreciate architectural grace with a touch of vintage allure, this ring complements slender fingers and pairs beautifully with stackable wedding bands or a simple platinum band.

Should you need resizing, our in-house artisans ensure a precise fit without compromising the ring’s integrity or finish.

Visit our Williamsburg studio to experience this marquise halo ring firsthand or begin your custom design journey online with Haejin Jewelry, where expert craftsmanship meets ethical luxury in Brooklyn.

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.