Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated silhouette of a marquise diamond, its pointed ends tracing a delicate arc that seems to stretch the fingers with quiet elegance. This three-stone semi-set engagement ring in 18K yellow gold frames a 9 x 4.5 mm marquise center, inviting you to select the perfect lab-grown diamond to complete its poetic balance.

Crafted in Williamsburg, the band’s warm yellow gold is hand-finished to a smooth, comfort fit that sits low against the skin, ideal for everyday wear. The three-stone setting offers a subtle narrative of past, present, and future, with side stones designed to enhance the marquise’s signature brilliance without overpowering its refined shape.

Each ring is made with lab-grown diamonds, reflecting a commitment to ethical jewelry that reduces environmental impact while preserving clarity and fire. The semi-set design allows for a personalized choice of center stone, ensuring your ring is as unique as your story.

Its slender profile and secure prong setting make this ring glove-friendly and stackable, perfect for layering with wedding bands or other meaningful pieces. The elongated marquise shape visually lengthens the finger, lending an architectural grace that suits those who appreciate modern geometry with a romantic edge.

Resizing is available to ensure a precise fit, and our Brooklyn studio welcomes you to explore options in person or begin your custom design journey online with ease.

Haejin Jewelry stands as a Brooklyn fine-jewelry studio dedicated to crafting lab-grown diamond engagement rings with expert care and ethical craftsmanship, rooted in the vibrant heart of Williamsburg.

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.