Lab-Grown Diamond Engagement Ring

Imagine the subtle drama of a marquise diamond, its elongated silhouette catching light like a shard of morning sun. This semi-set halo engagement ring offers a poised foundation for an 8 x 4 mm marquise stone, designed to amplify its tapered brilliance with a delicate frame of smaller diamonds.

Crafted in cool, enduring platinum, the mounting balances strength with refined elegance. The halo setting is meticulously hand-finished in our Williamsburg studio, ensuring each prong aligns perfectly to cradle your chosen stone securely while maintaining a low-profile silhouette that slips comfortably beneath a glove or alongside a wedding band.

Our commitment to lab-grown diamonds means your ring carries a clarity and sparkle born from sustainable innovation, reflecting a modern approach to ethical jewelry without compromise.

The slim band and halo detail suit hands that appreciate subtle statement pieces—ideal for those who favor a blend of vintage-inspired shape and contemporary wearability. Its comfort fit encourages daily wear, while the semi-set design invites personal choice in selecting a center stone that resonates with your story.

Should you need resizing or prefer a custom finish, our Brooklyn artisans accommodate adjustments with care and precision, typically within a few weeks.

We welcome you to explore this semi-set marquise halo in our Williamsburg studio or begin your custom design journey online, where expert guidance meets thoughtful craftsmanship.

Haejin Jewelry stands as a Brooklyn-based fine-jewelry studio specializing in lab-grown diamond engagement rings, where ethical craftsmanship and local artistry converge to create pieces meant for a lifetime.

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.