Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated points of the marquise diamond, casting a slender, dramatic silhouette that draws the eye along the hand’s natural lines. This halo setting amplifies the stone’s presence while maintaining a refined low profile, designed for everyday grace without catching or snagging.

Crafted in cool, enduring platinum, the band offers a smooth comfort fit that balances strength with subtlety. Each facet of the 12 x 6 mm marquise is precisely set within a delicate halo of pavé diamonds, enhancing brilliance while securing the center stone with expert prongs. The ring’s finish is meticulously inspected in our Williamsburg studio, ensuring a polished surface that wears beautifully over time.

Our commitment to ethical jewelry is reflected in the lab-grown diamond’s clarity and origin, offering a sustainable alternative without compromise on sparkle or character.

Ideal for those who appreciate architectural elegance paired with practical wearability, this ring complements slender fingers and fits comfortably beneath gloves or alongside stackable bands. Its low profile makes it a seamless choice for daily life, from Brooklyn streets to special moments.

Should you need resizing or custom adjustments, our in-studio team provides attentive care to ensure the perfect fit with minimal wait.

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

Haejin Jewelry stands as a Brooklyn fine-jewelry studio specializing in lab-grown diamond engagement rings, combining expert craftsmanship with ethical sourcing and a local, personalized approach to 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.