Lab-Grown Diamond Engagement Ring

When light catches the elongated silhouette of a marquise diamond, it traces a delicate arc of brilliance that seems to stretch beyond the hand. This semi-set platinum band cradles a 10 x 5 mm marquise center, its pointed ends lending a subtle drama to an otherwise minimalist solitaire design.

Crafted in Williamsburg, the platinum band is polished to a soft sheen, offering a cool, weighty feel that balances the diamond’s graceful geometry. The low-profile setting ensures the ring sits comfortably beneath gloves or alongside other bands, making it an elegant choice for everyday wear. Each piece undergoes meticulous finishing and inspection in-studio, reflecting a commitment to refined craftsmanship.

Our diamonds are lab-grown, offering a clarity and sparkle indistinguishable from mined stones, with a fraction of the environmental impact. This ethical approach aligns with a modern sensibility—beautiful, responsible, and rooted in Brooklyn’s creative spirit.

Designed for those who appreciate a blend of classic romance and contemporary ease, this solitaire suits slender to medium finger shapes, its elongated form visually lengthening the hand. The semi-set style invites you to select a center stone that resonates personally, making the ring uniquely yours.

Resizing is available to ensure a perfect fit, with attentive care guidance provided to maintain the platinum’s luster and the diamond’s fire over time.

Visit our Williamsburg studio to explore this design in person or begin your custom journey online—where thoughtful design meets Brooklyn’s artisanal heart.

Haejin Jewelry stands as a Brooklyn-based fine-jewelry studio specializing in lab-grown diamond engagement rings, blending expert craftsmanship with ethical sourcing and a deep connection to New York City’s vibrant design community.

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.