Lab-Grown Diamond Engagement Ring

Imagine the subtle elongation of your finger as a 5 x 3 mm marquise diamond finds its place—an elegant shape known for its tapered drama and graceful silhouette. This semi-set platinum mounting awaits your choice of center stone, crafted with a low-profile design that hugs the finger comfortably for everyday wear.

Meticulously finished in platinum, the band offers a secure setting with delicate accent details that enhance the marquise’s distinctive shape without adding bulk. Its streamlined form ensures compatibility with gloves and stacking, making it a versatile companion for a modern lifestyle.

Each piece reflects our commitment to ethical jewelry, featuring lab-grown diamonds that combine clarity with sustainability, all shaped and set in our Williamsburg studio.

Designed for those who appreciate refined engineering and subtle presence, this ring suits slender to medium finger sizes and balances well with other bands or wedding rings. The semi-set option allows you to select a marquise diamond that matches your vision and budget.

Resizing is straightforward and handled in-house, ensuring your ring maintains its integrity and comfort over time.

Visit our Williamsburg studio to explore this setting in person or begin your custom design journey online—crafted for daily life, made with Brooklyn care.

Haejin Jewelry stands as a Brooklyn fine-jewelry studio specializing in lab-grown diamond engagement rings, blending expert craftsmanship with ethical sourcing and local artistry 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.