Lab-Grown Diamond Engagement Ring

Imagine the subtle drama of a marquise diamond catching the light as it elongates the finger with its tapered silhouette. This semi-set platinum solitaire ring offers a refined foundation, crafted with a low-profile bezel setting that balances security and sleekness.

Each band is hand-forged in our Williamsburg studio, polished to a satiny finish that feels weightless against the skin. The platinum’s cool tone complements the marquise’s sharp facets, while the setting’s smooth edges ensure comfort for daily wear.

Our diamonds are lab-grown, chosen for their clarity and ethical provenance, reflecting a commitment to sustainability without compromise. The 8 x 4 mm marquise shape lends itself to those who appreciate a blend of vintage-inspired elegance and modern geometry.

Designed to suit slender to medium finger sizes, this solitaire mounting pairs effortlessly with stacking bands or stands strikingly alone. Its streamlined profile slips easily beneath gloves or sleeves, making it a versatile choice for everyday life.

Should you need resizing or prefer a custom stone, our team guides you through each step with care and transparency. Typical lead times align with our meticulous handcrafting process.

We invite you to explore this semi-set marquise solitaire in person at our Williamsburg studio or begin your custom design journey online, where expert advice meets artisan precision.

Haejin Jewelry stands as a Brooklyn-based fine-jewelry studio specializing in 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.