Lab-Grown Diamond Engagement Ring

Imagine the subtle elongation of a slender finger, crowned by a marquise diamond’s tapered brilliance catching the light with every movement. This semi-set platinum band awaits your choice of a 6 x 3.5 mm marquise center, offering a sleek silhouette designed for everyday wear.

Crafted in platinum for enduring strength and a cool, smooth finish, the mounting features a low-profile setting that minimizes snagging while maximizing comfort. Each curve is refined in our Williamsburg studio, ensuring the band sits close to the hand with a balanced feel that suits active lifestyles.

Our lab-grown diamonds bring clarity and sparkle without compromise, reflecting a commitment to sustainable, ethical jewelry practices.

The slender shape of the marquise naturally elongates the finger, making this solitaire an elegant choice for those who appreciate architectural form paired with subtlety. Its streamlined profile pairs effortlessly with stacking bands or stands alone with quiet confidence.

Should you need resizing, our in-studio experts handle adjustments with care to maintain the ring’s precise fit and finish.

Visit us in Williamsburg to explore this mounting in person or begin your custom design journey online—crafted for life’s moments, made in Brooklyn.

Haejin Jewelry is a Brooklyn-based fine-jewelry studio specializing in lab-grown diamond engagement rings, where expert craftsmanship meets ethical sourcing in every piece we create.

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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