Lab-Grown Diamond Engagement Ring

When light catches the elongated silhouette of a marquise diamond, it reveals a striking balance of sharp geometry and graceful tapering—an emblem of quiet confidence. This semi-set platinum band awaits your choice of a 7 x 3.5 mm marquise center, designed to showcase the stone’s distinctive brilliance with minimal distraction.

Crafted in platinum, the mounting offers a sleek, low-profile setting that hugs the finger comfortably, ideal for everyday wear. The precision of the accents enhances the diamond’s linear elegance without overpowering it, while the smooth finish ensures a refined tactile experience.

Each piece reflects Haejin Jewelry’s commitment to ethical sourcing, featuring lab-grown diamonds that reduce environmental impact without compromising clarity or fire.

The slender band suits those who appreciate modern minimalism with a structured edge, pairing effortlessly with stacking rings or worn solo for a statement of subtle sophistication. Its low profile also makes it glove-friendly and unobtrusive for daily life.

Should you need resizing, our Brooklyn studio offers expert adjustments to ensure a perfect fit, with attentive care throughout the process.

Explore this semi-set marquise engagement ring in our Williamsburg studio or begin your custom design journey online—crafted for those who value clarity, structure, and ethical craftsmanship.

Haejin Jewelry stands as a Brooklyn fine-jewelry studio specializing in lab-grown diamond engagement rings, blending expert craftsmanship with ethical values and local authenticity in every creation.

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.