Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated silhouette of a marquise diamond, casting a slender, dramatic sparkle that seems to stretch beyond the finger. This semi-set solitaire ring features a 9 by 4.5 mm marquise center, its pointed ends framed delicately by a 10K white gold band shaped and polished in our Williamsburg studio.

The band’s subtle taper and smooth comfort fit cradle the stone low against the hand, designed for everyday wear without catching or shifting. Each prong is hand-forged and inspected to ensure the diamond sits securely while allowing maximum light to enter the gem’s signature tapered facets.

Crafted from responsibly sourced 10K white gold, this ring embraces the clarity and brilliance of a lab-grown diamond, reflecting a commitment to ethical jewelry that respects both people and planet.

Its slender profile suits those who appreciate refined geometry and a ring that layers effortlessly with wedding bands or stackable accents. The marquise shape’s elongation visually lengthens the finger, offering a graceful statement without overwhelming smaller hands.

Should you need a custom fit, resizing is handled expertly in-house to maintain the ring’s seamless silhouette. Typical lead times reflect the care taken in handcrafting each piece.

Explore this semi-set marquise solitaire in our Williamsburg studio or begin your custom design journey online—where thoughtful craftsmanship meets Brooklyn’s artisanal spirit.

Haejin Jewelry stands as a Brooklyn fine-jewelry studio specializing in lab-grown diamond engagement rings, combining expert craftsmanship with ethical sourcing and a local, personalized design experience.

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

Explore our Guides & Education and Stories & Lifestyle for diamond education, care tips, and real studio stories.

Finished for daily wear — a low-profile silhouette and polished edges help minimize snagging.