Lab-Grown Diamond Engagement Ring

When light catches the elongated curves of a marquise diamond, it traces a silhouette both bold and delicate—like a whispered promise. This semi-set solitaire invites you to choose a center stone that measures 12 by 6 millimeters, offering a striking balance between presence and grace.

Crafted in 18K white gold, the mounting’s slender prongs cradle the stone with precision, allowing maximum brilliance to dance across its pointed ends. The band’s smooth finish and subtle taper ensure a comfortable fit, designed for everyday wear without catching or shifting.

Each piece reflects our commitment to sustainability, featuring lab-grown diamonds that mirror the clarity and fire of mined stones while reducing environmental impact.

This solitaire suits those who appreciate architectural elegance with a romantic edge—its elongated shape naturally elongates the finger, pairing beautifully with stackable bands or worn solo. The low-profile setting keeps the ring glove-friendly and unobtrusive.

Should you need resizing or prefer a custom stone selection, our Brooklyn studio offers personalized consultations to guide you through every detail with care and expertise.

Explore this marquise solitaire in person at our Williamsburg studio or begin your custom design journey online—where craftsmanship meets thoughtful intention.

Haejin Jewelry stands as a Brooklyn fine-jewelry studio devoted to lab-grown diamond engagement rings, blending ethical craftsmanship with local artistry to create pieces meant for a lifetime.

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.