Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated silhouette of an 8 x 4 mm marquise diamond, its tapered points drawing the eye along a delicate halo of shimmering platinum. This engagement ring balances bold geometry with subtle brilliance, crafted in our Williamsburg studio where every curve and facet is refined by hand.

Set in polished platinum, the halo setting enhances the marquise’s signature tapered drama while maintaining a low profile for everyday wear. The band’s smooth finish and comfort fit ensure it rests lightly on the finger, ideal for stacking or solo elegance. Each ring undergoes meticulous inspection to meet exacting standards of symmetry and polish.

Our diamonds are lab-grown, offering a clear, sustainable alternative without compromise on sparkle or clarity.

This ring suits those who appreciate architectural lines paired with refined craftsmanship—its narrow shape elongates the hand, while the halo adds a whisper of vintage allure. The low-profile setting fits comfortably under gloves and layers seamlessly with other bands.

Should you need resizing, our Brooklyn studio provides precise adjustments to ensure a perfect fit without disrupting the ring’s balance.

Explore this marquise halo in person at our Williamsburg workshop or begin your custom design journey online, where expert guidance awaits.

Haejin Jewelry stands as a Brooklyn fine-jewelry studio dedicated to lab-grown diamond engagement rings, blending ethical craftsmanship with local artisan expertise to create pieces made for daily life and lasting beauty.

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.