Lab-Grown Diamond Engagement Ring

Imagine the gentle curve of a marquise diamond catching the morning light, its elongated silhouette casting a subtle, graceful shadow across your hand. This semi-set platinum mounting awaits your choice of a 12 x 6 mm marquise center, designed to cradle the stone with slender prongs that elevate its signature tapered points while maintaining a low profile for everyday wear.

Crafted in our Williamsburg studio, the band’s polished platinum offers a cool, weighty feel that balances durability with refined elegance. The solitaire setting’s clean lines emphasize the diamond’s dramatic shape, allowing light to dance freely through its facets without distraction. Each piece undergoes meticulous hand finishing and inspection to ensure a seamless fit and lasting comfort.

Our commitment to ethical jewelry is reflected in the exclusive use of lab-grown diamonds, offering clarity and brilliance with a smaller environmental footprint.

This mounting suits those who appreciate architectural beauty paired with subtlety—its slender silhouette complements slender fingers and layers effortlessly with other bands. The low-profile setting slips easily under gloves or sleeves, making it a practical choice for daily life.

Should you wish to adjust sizing or explore custom options, our Brooklyn studio offers personalized consultations with attentive care and transparent timelines.

Visit us in Williamsburg or begin your custom design journey online to bring your marquise solitaire vision to life with Haejin Jewelry’s expert craftsmanship and ethical approach to fine jewelry in Brooklyn.

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.