Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated silhouette of an 8 x 4 mm marquise diamond, casting a slender, graceful shadow across the hand. This semi-set solitaire ring foundation in 10K white gold awaits your choice of center stone, designed to showcase the marquise’s signature tapered drama.

Handcrafted in our Williamsburg studio, the band features a delicate low-profile setting that balances security with subtlety. The cool white gold is meticulously finished to a soft satin sheen, offering a modern contrast to the diamond’s sharp geometry. Its comfort fit ensures the ring sits naturally for daily wear, while the slender shank complements stacking or solo styling.

Each piece reflects our commitment to ethical jewelry: the setting is crafted exclusively for lab-grown diamonds, reducing environmental impact without compromising brilliance or clarity.

Ideal for those drawn to architectural elegance and a refined silhouette, this mounting suits hands that appreciate a sleek, glove-friendly profile. The marquise shape visually elongates the finger, lending a poised sophistication to every gesture.

Should you need resizing, our in-house artisans adjust the band with precision, preserving the integrity of the setting and finish.

Explore this semi-set marquise solitaire in person at our Williamsburg studio or begin your custom design journey online—where craftsmanship meets conscious choice.

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.