Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated silhouette of an 8 x 4 mm marquise diamond, its tapered points drawing the eye along a sleek, three-stone arrangement. This semi-set engagement ring invites you to select a center stone that balances architectural grace with modern minimalism.

Crafted in warm 18K rose gold, the gently curved band supports two smaller side stones, enhancing the marquise’s signature drama without overwhelming the hand. The low-profile setting ensures daily comfort, while the polished finish reflects subtle light with every movement.

Each diamond is lab-grown, offering a clear, sustainable alternative that aligns with thoughtful craftsmanship and environmental care.

Designed for those who appreciate clean lines and confident structure, this ring suits slender fingers and pairs effortlessly with stackable bands or a wedding band of your choice. Its refined silhouette slips easily beneath gloves or sleeves, making it a versatile companion for everyday life.

Should you need resizing or prefer a custom consultation, our Williamsburg studio welcomes you to explore options with no pressure and full transparency.

Discover the possibilities of this marquise semi-set by visiting us in Brooklyn or designing your ring online—where ethical jewelry meets expert craftsmanship.

Haejin Jewelry stands as a Brooklyn fine-jewelry studio specializing in lab-grown diamond engagement rings, blending ethical clarity with artisanal skill and local authenticity.

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.