Lab-Grown Diamond Engagement Ring

Light catches the elongated silhouette of a marquise diamond, its pointed ends drawing the eye along a sleek, confident line. This semi-set engagement ring foundation in 10K yellow gold offers a modern-minimal frame, designed to highlight a 9 x 4.5 mm marquise center stone of your choosing.

Crafted with precision in Williamsburg, the band’s smooth finish and subtle accents balance architectural clarity with everyday wearability. The low-profile setting ensures comfort beneath gloves or alongside stackable bands, while the warm gold hue complements the diamond’s brilliance without distraction.

Each piece reflects our commitment to ethical jewelry: lab-grown diamonds provide exceptional clarity and sparkle with a lighter environmental footprint. This ring’s design suits those who appreciate structured elegance and a confident statement that remains quietly refined.

Should you need resizing or prefer a particular accent style, our Brooklyn studio offers personalized consultations to tailor your ring with care and expertise. Typical lead times accommodate thoughtful customization without rush.

Explore this semi-set marquise ring in person at our Williamsburg studio or begin your custom design journey online—where clarity meets craftsmanship in every detail.

Haejin Jewelry stands as a Brooklyn fine-jewelry studio specializing in lab-grown diamond engagement rings, blending ethical craftsmanship with local artistry to create pieces made for daily life and lasting meaning.

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.