Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated silhouette of the marquise diamond, its tapered points drawing the eye along a graceful arc. This semi-set three-stone ring offers a foundation to showcase an 8 x 4 mm marquise center, framed by two smaller stones that echo its refined drama.

Crafted from solid 18K yellow gold, the band is hand-finished in our Williamsburg studio to a smooth, comfort fit that sits low against the finger. The setting’s delicate prongs hold the stones securely while allowing light to flood the facets, enhancing brilliance without bulk.

Each lab-grown diamond is chosen for clarity and ethical provenance, reflecting a commitment to sustainable fine jewelry without compromise. The semi-set design invites personalization, perfect for those who want a custom centerpiece paired with expert craftsmanship.

Its slender profile and balanced weight make this ring ideal for daily wear, stacking alongside wedding bands or worn solo for understated elegance. The shape’s elongation visually lengthens the finger, lending a subtle sophistication to any hand.

Resizing is available to ensure a precise fit, with typical lead times of 4–6 weeks from design approval to delivery.

Explore this semi-set marquise engagement ring in person at our Williamsburg studio or begin your custom design journey online—where thoughtful artistry meets modern romance.

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 distinctly local sensibility.

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.

Finished for daily wear — a low-profile silhouette and polished edges help minimize snagging.