Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated facets of a marquise diamond, casting a slender beam that seems to stretch beyond the hand. This semi-set engagement ring foundation in warm 18K yellow gold invites your choice of a 9 x 4.5 mm marquise center stone, its tapered silhouette known for adding graceful drama and elongating the finger.

Each band is meticulously crafted in our Williamsburg studio, shaped and polished to a smooth comfort fit that rests lightly against the skin. The low-profile setting ensures daily wearability without catching, while delicate accent details frame the center stone’s pointed elegance with subtle artisan precision.

Our commitment to lab-grown diamonds means your ring begins with a stone of remarkable clarity and ethical origin, reflecting a sustainable approach without compromise.

Ideal for those who appreciate a refined statement that balances bold geometry with understated comfort, this mounting suits slender to medium finger sizes and layers beautifully with stackable bands or wedding rings.

Should you need resizing or prefer a custom accent arrangement, our Brooklyn studio offers personalized consultations to tailor your vision with care and expertise.

Explore this semi-set marquise engagement ring in person at our Williamsburg workshop or start your custom design journey online, where every detail is shaped by your story.

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

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.