Lab-Grown Diamond Engagement Ring

When light catches the elongated silhouette of a 12 x 6 mm marquise diamond, it reveals a striking balance of tapered drama and refined elegance. This semi-set engagement ring offers a low-profile setting crafted in 18K white gold, designed to sit close to the finger for everyday comfort without sacrificing brilliance.

The band’s smooth finish and subtle accent stones enhance the center’s distinctive shape while maintaining a sleek, glove-friendly profile. Each piece is meticulously hand-finished in our Williamsburg studio, ensuring precise prong placement and a secure hold that withstands daily wear.

Our commitment to ethical jewelry shines through the use of a lab-grown marquise diamond, combining clarity and sustainability with modern craftsmanship. The cool white gold setting complements the stone’s icy fire, while the rose gold option adds a gentle warmth, both polished to a satin sheen that resists scratches.

Ideal for those who appreciate architectural lines and a ring that layers effortlessly with other bands, this design suits a variety of hand shapes, especially elongating fingers with its narrow points. The semi-set format invites you to select a center stone that reflects your personal vision.

Resizing is straightforward and handled in-house, with typical lead times of 4–6 weeks from design consultation to delivery.

Visit our Williamsburg studio to explore this marquise semi-set in person or begin your custom design journey online with Haejin Jewelry, where expert craftsmanship meets ethical innovation in Brooklyn.

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.