Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated silhouette of a marquise diamond, its tapered points drawing the eye along a graceful arc. This semi-set halo engagement ring foundation in platinum awaits your choice of a 12 x 6 mm center stone, designed to amplify the marquise’s signature drama with a delicate frame of shimmering accents.

Crafted in cool, polished platinum, the mounting balances strength with refined minimalism. The halo setting is engineered for low profile wear, allowing the ring to sit comfortably beneath gloves or alongside stackable bands. Each prong and pavé detail is hand-finished in our Williamsburg studio, ensuring a precise fit and enduring shine.

Our commitment to lab-grown diamonds means your center stone will offer exceptional clarity and brilliance with a lighter environmental footprint.

This design suits those who appreciate architectural elegance paired with everyday practicality—its slender shape elongates the finger while the halo adds subtle radiance without excess bulk.

Should you need resizing, our in-house artisans provide careful adjustments to maintain the ring’s structural integrity and comfort fit.

Explore this semi-set halo in person at our Williamsburg studio or begin your custom design journey online, where expert guidance awaits.

Haejin Jewelry stands as a Brooklyn-based fine-jewelry atelier specializing in lab-grown diamond engagement rings, blending ethical craftsmanship with modern design sensibility 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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