Lab-Grown Diamond Engagement Ring

Light catches the elongated silhouette of a marquise diamond, its tapered points drawing the eye along a graceful arc. This semi-set platinum solitaire ring offers a refined foundation, ready to showcase a 12 x 6 mm marquise center stone with architectural presence and subtle drama.

Crafted from cool, polished platinum, the mounting balances strength with a low-profile design that sits comfortably close to the finger. The solitaire setting’s clean lines ensure daily wearability without catching, while the smooth band offers a gentle comfort fit ideal for stacking or solo wear.

Each piece is meticulously finished in our Williamsburg studio, where expert hands inspect every facet of the mounting to ensure precision and durability. The ethical choice of a lab-grown diamond center complements the studio’s commitment to sustainability and traceability.

Designed for those who appreciate modern geometry and understated elegance, this ring suits hands that favor elongated shapes and a sleek silhouette. Its low profile makes it glove-friendly and practical for everyday life.

Should you need resizing or prefer to explore custom options, our Brooklyn studio offers personalized consultations with flexible lead times tailored to your schedule.

Visit us in Williamsburg to experience this semi-set marquise solitaire in person or begin your custom design journey online. Haejin Jewelry stands as a Brooklyn fine-jewelry studio dedicated to expert craftsmanship and ethical lab-grown diamond engagement rings, blending local artistry with sustainable luxury.

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.