Lab-Grown Diamond Engagement Ring

Imagine the elongated silhouette of a marquise diamond catching light with every subtle movement, its pointed ends lending a refined drama to your hand. This semi-set solitaire ring awaits your choice of a 12 x 6 mm marquise center, designed to sit low against the finger for seamless daily wear.

Crafted from 18K white gold, the mounting balances strength with elegance, featuring a secure setting that minimizes height without sacrificing brilliance. The band’s smooth finish and comfort fit ensure it feels as natural as it looks, ideal for stacking or solo wear.

Each lab-grown diamond option reflects a commitment to ethical sourcing and sustainability, offering clarity and sparkle without compromise. The marquise shape’s tapered form visually elongates the finger, enhancing grace and presence.

Resizing is straightforward, handled in-studio with care to maintain the ring’s structural integrity. Whether paired with a wedding band or worn alone, this setting adapts effortlessly to your lifestyle.

Visit our Williamsburg studio to explore this semi-set marquise solitaire or begin your custom design journey online—crafted for life’s most meaningful moments.

Haejin Jewelry stands as a Brooklyn-based fine-jewelry studio specializing in lab-grown diamond engagement rings, blending expert craftsmanship with ethical values in every piece we create.

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.