Lab-Grown Diamond Engagement Ring

When light catches the elongated silhouette of a marquise diamond, it draws the eye along a graceful arc—both striking and refined. This semi-set engagement ring foundation in warm 18K rose gold offers a delicate frame designed to cradle a 6 x 3 mm marquise center stone, accented subtly to enhance its distinctive shape.

Crafted with a low-profile setting, the band sits close to the finger, minimizing snagging and ensuring comfort for everyday wear. The rose gold’s soft glow complements the marquise’s tapered points, while precise finishing smooths every edge for a seamless feel. Each mounting undergoes meticulous inspection in our Williamsburg studio to meet exacting standards.

Choosing a lab-grown diamond for your center stone reflects a commitment to ethical jewelry—reducing environmental impact without sacrificing brilliance or clarity.

This ring base suits those who appreciate architectural elegance with a modern sensibility, especially hands that favor slender, elongated shapes. Its streamlined design pairs effortlessly with stacking bands or a wedding ring, making it a versatile choice for daily life.

Should you need resizing, our in-house team adjusts the band with care to maintain structural integrity and comfort fit.

Explore this semi-set marquise ring in person at our Williamsburg studio or begin your custom design journey online—crafted for those who value thoughtful detail and Brooklyn authenticity.

Haejin Jewelry stands as a Brooklyn fine-jewelry studio specializing in lab-grown diamond engagement rings, blending expert craftsmanship with ethical sourcing and a local, personalized approach to design.

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.