Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated silhouette of a marquise diamond, its tapered points drawing the eye along the hand’s natural lines. This semi-set three-stone mounting in 10K yellow gold awaits your choice of a 9 x 4.5 mm center stone, designed to cradle the gem securely while showcasing its distinctive shape.

Handcrafted in our Williamsburg studio, the band features a delicate balance of strength and refinement, with prongs shaped to protect the marquise’s sharp tips. The low-profile setting ensures everyday wearability, slipping comfortably beneath gloves or alongside stackable rings without catching.

Each piece reflects our commitment to ethical jewelry, crafted exclusively for lab-grown diamonds that offer clarity and brilliance with a smaller environmental footprint.

The warm glow of yellow gold complements a variety of skin tones, while the three-stone design adds subtle dimension—ideal for those who appreciate a blend of classic form and artisanal detail. The semi-set allows you to select a center diamond that suits your personal vision, whether you favor intense sparkle or understated elegance.

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

Explore this semi-set marquise engagement ring in person at our Williamsburg studio 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 artistry to create pieces made for daily life and lasting beauty.

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.