Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated points of a marquise diamond, casting a slender, graceful shadow across the hand. This semi-set platinum band awaits your choice of a 6 x 3 mm marquise center, designed to showcase the stone’s distinctive tapered drama with a refined silhouette.

Crafted in platinum for enduring strength, the mounting features a low-profile setting that hugs the finger comfortably, ideal for everyday wear. Its streamlined design minimizes snagging, while the secure prongs cradle the stone with precision, reflecting meticulous hand finishing in our Williamsburg studio.

Each lab-grown diamond option offers clarity and brilliance without compromise, aligning with a commitment to ethical jewelry and sustainable sourcing. The cool, weighty feel of platinum enhances the ring’s presence without overwhelming delicate hands.

Suited for those who appreciate architectural elegance and a sleek profile, this solitaire mounting pairs effortlessly with stackable bands or stands alone as a statement of modern romance. Its balanced proportions accommodate a range of finger sizes and shapes, ensuring a natural fit.

Should you need resizing or prefer a custom consultation, our Brooklyn studio provides attentive, pressure-free service with typical lead times tailored to your design.

Explore this semi-set marquise solitaire in person or begin your custom design journey online—where craftsmanship meets thoughtful intention.

Haejin Jewelry is a Brooklyn-based fine-jewelry studio specializing in lab-grown diamond engagement rings, blending expert craftsmanship with ethical values to create pieces made for daily life in New York City.

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.