Lab-Grown Diamond Engagement Ring

Sunlight filters through a softly rounded cushion diamond, its gentle facets catching the eye with a quiet glow. This semi-set platinum engagement ring foundation awaits your choice of a 5 x 5 mm center stone, designed to showcase the stone’s warm, vintage-inspired shimmer.

Handcrafted in our Williamsburg studio, the band is forged from cool, polished platinum, known for its enduring strength and subtle weight. The low-profile setting features delicate accent details that frame the center stone without overpowering it, ensuring everyday comfort and ease of wear.

Each piece reflects a commitment to ethical sourcing, with lab-grown diamonds offering clarity and brilliance while reducing environmental impact.

Ideal for those who appreciate a balance of artisan craftsmanship and modern practicality, this mounting suits a variety of hand shapes and complements stacking with other bands. Its refined silhouette slips easily under gloves or sleeves, making it a versatile choice for daily life.

Should you need resizing, our in-studio experts ensure a precise fit without compromising the ring’s integrity.

Visit our Williamsburg workshop to explore this semi-set cushion engagement ring or begin your custom design journey online—crafted with care, made for your story.

Haejin Jewelry stands as a Brooklyn fine-jewelry studio dedicated to lab-grown diamond engagement rings, blending expert craftsmanship with ethical values 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.

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