Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated facets of a marquise diamond, casting a slender, dramatic silhouette that feels both bold and intimate. This semi-set engagement ring invites you to select a center stone that measures approximately 9 by 4.5 millimeters, offering a striking presence without overwhelming the hand.

Crafted from warm 10K rose gold, the band is shaped with subtle tapering to complement the marquise’s pointed ends, while the artisan’s hand-polished finish ensures a soft glow that enhances daily wear. The low-profile prong setting balances security with elegance, designed to sit comfortably beneath gloves or alongside stackable bands.

Each ring begins in our Williamsburg studio, where sustainable practices guide the selection of lab-grown diamonds—offering clarity and brilliance with a lighter environmental footprint. The rose gold’s gentle hue harmonizes with the marquise’s vintage-inspired geometry, making it a refined choice for those who appreciate craftsmanship and conscious luxury.

Its slender silhouette suits slender to medium finger sizes, elongating the hand with architectural grace. The semi-set design allows you to personalize your ring with a lab-grown marquise diamond of your preferred cut and clarity, creating a truly bespoke symbol of commitment.

Resizing is available to ensure a perfect fit, and our team is happy to guide you through care recommendations to maintain the ring’s delicate finish.

Visit our Williamsburg studio to explore this semi-set marquise solitaire or begin your custom design journey online—where expert guidance meets thoughtful craftsmanship.

Haejin Jewelry stands as a Brooklyn-based fine-jewelry studio specializing in lab-grown diamond engagement rings, blending ethical craftsmanship with local artisan expertise to create pieces made for a lifetime.

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.