Lab-Grown Diamond Engagement Ring

Imagine the subtle elongation of your finger as a marquise diamond, measuring 9 by 4.5 millimeters, catches the light with its tapered, dramatic silhouette. This semi-set halo engagement ring foundation in platinum offers a secure, low-profile setting designed for everyday grace and resilience.

Crafted in our Williamsburg studio, the platinum band is polished to a smooth comfort fit that slides on effortlessly and wears well beneath gloves or alongside stackable bands. The halo setting, ready to embrace your chosen center stone, balances brilliance with a refined architectural presence.

Each piece features a lab-grown diamond option, reflecting our commitment to ethical jewelry that minimizes environmental impact without compromising clarity or fire.

Its streamlined profile suits hands seeking elegance without excess height, ideal for those who value both style and practicality in daily wear.

Should you need resizing or customization, our in-studio process ensures a precise fit with attentive craftsmanship and timely delivery.

Visit us in Williamsburg or explore custom design online to bring this marquise halo semi-set to life with a center stone that speaks to your story.

Haejin Jewelry is a Brooklyn-based fine-jewelry studio specializing in lab-grown diamond engagement rings, where expert craftsmanship and ethical values meet the pulse of New York City’s creative 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.