Lab-Grown Diamond Engagement Ring

When light catches the elongated silhouette of this marquise-cut diamond, it reveals a striking balance of sharp geometry and graceful tapering, a quiet statement of refined confidence. Nestled within a precise halo setting, the 9 x 4.5 mm center stone is framed by a delicate circle of pavé diamonds that amplify its brilliance without overwhelming its sleek profile.

Crafted in cool, enduring platinum, the band offers a smooth comfort fit designed for everyday wear, its low-profile setting ensuring the ring sits close to the finger—ideal for stacking or pairing with a wedding band. Each facet is meticulously polished in our Williamsburg studio, where expert jewelers inspect every detail to maintain structural clarity and enduring strength.

Our commitment to ethical jewelry is reflected in the lab-grown diamond’s exceptional clarity and sustainable origin, reducing environmental impact while preserving the allure of natural light play.

This ring suits those who appreciate modern minimalism with architectural precision, especially hands that favor elongated shapes, as the marquise visually lengthens the finger. Its secure halo setting and platinum band make it glove-friendly and resilient for daily life.

Should you need resizing, our Brooklyn studio offers personalized adjustments to ensure a perfect fit without compromising the ring’s integrity.

Explore this design in person at our Williamsburg studio or begin your custom journey online—where thoughtful craftsmanship meets modern romance.

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