Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated silhouette of a marquise diamond, casting a slender beam that seems to stretch beyond the hand. This semi-set engagement ring foundation invites your choice of a 12 x 6 mm marquise stone, known for its tapered drama and ability to visually lengthen the finger.

Crafted from warm 14K rose gold, the band’s subtle blush complements the stone’s sharp geometry, while the low-profile mounting ensures daily wearability without catching. The setting’s clean lines and precise accents reflect a modern-minimal ethos, balancing clarity with confident structure. Each piece is meticulously finished and inspected in our Williamsburg studio, where comfort fit meets refined craftsmanship.

Choosing a lab-grown diamond here aligns with a commitment to ethical jewelry—offering brilliance with a lighter environmental footprint. This ring suits those who appreciate architectural elegance paired with understated strength, ideal for stacking or wearing solo with ease.

Should you need resizing or prefer a custom accent arrangement, our Brooklyn studio offers personalized consultations to tailor your vision. Lead times are transparent, with attentive care throughout the process.

Explore this semi-set marquise ring in person or begin your custom design journey online—crafted for life’s intimate moments in Williamsburg.

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

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.