Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated silhouette of a marquise diamond, casting a slender, dramatic shadow across your hand. This semi-set solitaire invites you to select a center stone that measures a striking 12 by 6 millimeters—its tapered points lending a refined, vintage-inspired elegance.

Crafted from warm 18K rose gold, the mounting is shaped with artisan precision in our Williamsburg studio. The slender prongs curve gently to cradle the stone securely while maintaining a low profile that rests comfortably against the finger. The band’s subtle taper enhances wearability, making it an ideal choice for daily life and effortless stacking.

Each piece reflects our commitment to ethical jewelry: designed for a lab-grown diamond that offers clarity and brilliance without compromise. This approach aligns with a sustainable ethos quietly embedded in every step of our Brooklyn workshop process.

The elongated marquise shape naturally elongates the finger, flattering a variety of hand sizes and shapes. Its solitaire setting emphasizes the diamond’s architectural form, perfect for those who appreciate modern geometry with a touch of classic romance.

Should you wish to resize, our in-house artisans ensure a precise fit without disrupting the ring’s delicate balance. Typical lead times accommodate thoughtful customization, reflecting the care poured into every detail.

Explore this semi-set marquise engagement ring in person at our Williamsburg studio or begin your custom design journey online. Haejin Jewelry combines expert craftsmanship, ethical clarity, and Brooklyn authenticity to create lab-grown diamond engagement rings that resonate with modern love 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.