Lab-Grown Diamond Engagement Ring

When light catches the elongated silhouette of this marquise-cut diamond, it draws the eye along its tapered points, creating a subtle drama that feels both refined and distinctive. Nestled within a delicate halo, the 6 x 3.5 mm center stone is securely set in polished platinum, its low-profile mounting designed to sit comfortably beneath a glove or daily wear.

Crafted in Williamsburg, this engagement ring balances technical precision with understated elegance. The halo setting amplifies brilliance without adding bulk, while the platinum band offers durability and a cool, smooth finish that molds naturally to the finger. Each ring undergoes meticulous hand inspection to ensure the prongs hold the stone firmly and the surface is flawlessly finished.

Choosing a lab-grown diamond reflects a commitment to ethical jewelry, reducing environmental impact without compromising on clarity or sparkle. The marquise shape’s elongated form complements slender fingers and pairs effortlessly with stacking bands or a wedding ring.

Resizing is available to ensure a perfect fit, and the ring’s design supports everyday wear with minimal maintenance. Whether experienced in custom design or new to engagement rings, you’re invited to explore this piece in our Williamsburg studio or begin your journey online.

Haejin Jewelry is a Brooklyn-based fine-jewelry studio specializing in lab-grown diamond engagement rings, where expert craftsmanship meets ethical sourcing and thoughtful design tailored for life 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.

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