Lab-Grown Diamond Engagement Ring

Light catches the elongated points of a marquise diamond, casting a subtle, tapered glow that draws the eye along the finger’s natural line. This semi-set engagement ring foundation in 18K white gold awaits your choice of a 9 x 4.5 mm marquise center, designed to showcase the stone’s distinctive silhouette with delicate accent settings that frame without overwhelming.

Each band is meticulously crafted in our Williamsburg studio, where the cool sheen of white gold is hand-finished to a smooth comfort fit, ensuring it sits low and secure for everyday wear. The accent stones are precisely set to enhance the center’s brilliance while maintaining a refined profile that slips easily beneath gloves or rings stacked alongside.

Our commitment to lab-grown diamonds means your ring begins with a stone of exceptional clarity and ethical provenance, reflecting a modern approach to sustainability without compromise.

Ideal for those who appreciate architectural elegance paired with subtle detailing, this mounting suits slender to medium finger shapes, offering a graceful elongation that balances boldness with wearability.

Should you need a custom size, resizing is straightforward and handled with care in-studio to preserve the ring’s integrity.

Explore this semi-set marquise engagement ring in person at our Williamsburg workshop or start your custom design journey online—where expert guidance meets thoughtful craftsmanship.

Haejin Jewelry stands as a Brooklyn fine-jewelry studio dedicated to lab-grown diamond engagement rings, blending ethical artistry with local expertise to create pieces meant for daily life and lasting stories.

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.

Finished for daily wear — a low-profile silhouette and polished edges help minimize snagging.