Lab-Grown Diamond Engagement Ring

Light catches the elongated silhouette of a marquise diamond, its tapered points drawing the eye along a sleek, confident line. This semi-set halo engagement ring foundation in platinum offers a refined stage for a 6 x 3.5 mm marquise center, designed to amplify the stone’s dramatic sparkle with a delicate halo that balances modern minimalism and architectural clarity.

Crafted in platinum for enduring strength and a cool, luminous finish, the mounting features a low-profile setting that sits close to the finger, ensuring everyday comfort without sacrificing brilliance. Each prong and bezel is meticulously polished in our Williamsburg studio, where precision meets quiet restraint in every detail.

The lab-grown marquise diamond you choose will reflect a commitment to ethical jewelry, reducing environmental impact while delivering exceptional clarity and fire.

Its slender shape and halo frame suit hands that appreciate a bold yet refined statement, pairing effortlessly with stackable bands or worn solo for a striking silhouette. The comfort fit shank and secure setting make it glove-friendly and ideal for daily wear.

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

Explore this semi-set halo ring in person at our Williamsburg studio or begin your custom design journey online—crafted for those who value clarity, structure, and confident elegance.

Haejin Jewelry stands as a Brooklyn-based fine-jewelry studio specializing in lab-grown diamond engagement rings, where ethical craftsmanship and expert design converge to create pieces made for life’s most meaningful moments.

See how your design comes to life with our Ring Design Online, or start a truly custom piece from scratch in our Williamsburg studio.

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