Lab-Grown Diamond Engagement Ring

Imagine the subtle drama of a marquise diamond, its tapered points drawing the eye along the length of your finger, framed by a delicate halo that catches light from every angle. This semi-set engagement ring foundation in cool platinum offers a refined stage for an 8 x 4 mm marquise center, ready to be paired with a stone that balances architectural elegance and luminous sparkle.

Crafted in our Williamsburg studio, the platinum band is hand-finished to a smooth, comfort fit that sits low against the hand, making it ideal for daily wear. The halo setting is designed to amplify brilliance without adding bulk, ensuring the ring remains glove-friendly and stackable with other bands.

Each piece reflects our commitment to ethical jewelry: the setting awaits your choice of a lab-grown diamond, offering clarity and sustainability without compromise. The semi-set format allows for personalized selection, so your ring is truly one of a kind.

Perfect for those who appreciate a blend of vintage-inspired shape and contemporary craftsmanship, this ring suits slender to medium finger profiles, enhancing natural hand lines with its elongated silhouette.

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

Visit us in Williamsburg or explore custom design options online to begin crafting your engagement ring with intention and care.

Haejin Jewelry stands as a Brooklyn-based fine-jewelry studio specializing in lab-grown diamond engagement rings, where expert craftsmanship and ethical values meet in every custom design.

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.