Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated points of a marquise diamond, casting a slender, graceful shadow across the hand. This semi-set three-stone ring invites your choice of a 12 x 6 mm marquise center, its distinctive shape evoking both vintage allure and modern drama.

Crafted from warm 18K yellow gold, the band is shaped and polished in our Williamsburg studio to a smooth comfort fit that wears effortlessly every day. The three-stone setting balances presence with subtlety, designed low enough to slip under gloves or stack alongside other bands without catching.

Each piece is finished by hand, inspected for precision, and built to cradle your chosen lab-grown diamond securely, reflecting our commitment to sustainable, ethical jewelry.

Ideal for those who appreciate architectural elegance with a touch of artisan warmth, this ring complements longer fingers and suits a variety of personal styles. The semi-set format offers flexibility, allowing you to select a marquise diamond that speaks to your unique vision.

Should you need resizing or advice on care, our Brooklyn studio offers personalized support to ensure your ring fits perfectly and endures daily wear.

Explore this design in person at our Williamsburg workshop or begin your custom journey online—where craftsmanship meets conscious choice.

Haejin Jewelry stands as a Brooklyn fine-jewelry studio dedicated to expert craftsmanship and ethical lab-grown diamond engagement rings, blending local artistry with sustainable values in every custom design.

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.