Lab-Grown Diamond Engagement Ring

The elongated silhouette of the marquise diamond captures light with a subtle, tapered brilliance that draws the eye along the finger’s natural line. This semi-set solitaire mounting in platinum offers a sleek, low-profile frame designed for everyday wear, balancing refined elegance with practical comfort.

Crafted in our Williamsburg studio, the platinum band is meticulously polished to a smooth finish, ensuring a comfortable fit that sits close to the hand without catching. The mounting’s secure prongs cradle a 9 x 4.5 mm marquise stone, allowing you to select a center diamond that reflects your personal style and ethical values.

Each lab-grown diamond we work with embodies clarity and sustainability, aligning with a commitment to responsible luxury. The platinum setting’s durability and hypoallergenic qualities make it ideal for daily wear, while its streamlined design pairs effortlessly with wedding bands or stackable rings.

Designed for those who appreciate architectural grace and subtle sophistication, this engagement ring suits slender to medium finger sizes, enhancing the hand’s natural elegance without overwhelming it. Its low profile also makes it glove-friendly and unobtrusive for active lifestyles.

Should you need resizing or prefer a custom finish, our Brooklyn studio offers personalized consultations to ensure your ring fits perfectly and reflects your vision.

Explore this semi-set marquise solitaire in person at our Williamsburg studio or begin your custom design journey online. Haejin Jewelry is proud to be a Brooklyn-based fine-jewelry studio specializing in lab-grown diamond engagement rings, where expert craftsmanship and ethical sourcing meet thoughtful design for modern life.

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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