Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated points of a marquise diamond, casting a delicate shadow that dances along the hand. This semi-set three-stone engagement ring in platinum awaits your choice of an 8 x 4 mm marquise center, framed by two smaller stones that amplify its sculptural elegance.

Each band is meticulously crafted in our Williamsburg studio, where the cool weight of platinum is shaped and polished to a smooth, comfort fit. The low-profile setting ensures the ring sits close to the finger, balancing presence with everyday wearability. Fine prongs cradle the stones securely, their artisan finish revealing subtle handwork under close inspection.

Our diamonds are lab-grown, offering clarity and brilliance with a smaller environmental footprint, reflecting a modern approach to ethical jewelry.

Designed for those who appreciate architectural lines and refined detail, this ring complements slender fingers and pairs beautifully with stackable bands or a wedding band of your choice. Its understated height makes it glove-friendly and ideal for daily life.

Should you need resizing or wish to discuss stone options, our Brooklyn studio offers personalized consultations with transparent timelines.

Explore this semi-set marquise engagement ring in person or begin your custom design journey online—crafted with care in Williamsburg, Brooklyn.

Haejin Jewelry is a Brooklyn-based fine-jewelry studio specializing in lab-grown diamond engagement rings, combining expert craftsmanship with ethical sourcing and a deep connection to New York City's artisanal heritage.

See how your design comes to life with our Ring Design Online, or start a truly custom piece from scratch in our Williamsburg studio.

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