Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated silhouette of a marquise diamond, its pointed ends drawing the eye along the finger with a subtle, elegant drama. This semi-set three-stone ring foundation in 14K yellow gold offers a warm, luminous canvas ready to cradle a 12 x 6 mm marquise center stone of your choosing.

Crafted in our Williamsburg studio, the band’s smooth finish and balanced weight ensure a comfortable, everyday wear. The three-stone setting is designed with precise prongs that hold stones securely while allowing light to flood each facet, enhancing brilliance without excess height—ideal for a low-profile, glove-friendly fit.

Each piece reflects our commitment to ethical jewelry, featuring lab-grown diamonds that combine clarity with sustainability, reducing environmental impact without compromising beauty.

The gentle curve of the band complements the marquise’s tapered shape, flattering slender fingers and pairing effortlessly with stackable bands or wedding rings. Its semi-set nature invites you to select a center stone that resonates personally, making this ring a unique expression of your story.

Should you need resizing or guidance on stone selection, our Brooklyn studio offers personalized consultations to ensure a seamless process from design to wear.

Explore this semi-set marquise engagement ring in person at our Williamsburg workshop or begin your custom design journey online—crafted for those who value thoughtful detail and enduring style.

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 deep connection to New York City's artisanal spirit.

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.