Lab-Grown Diamond Engagement Ring

Soft light catches the gentle curves of a 5 x 5 mm cushion diamond, its rounded corners and delicate facets whispering quiet romance. This three-stone semi-set ring offers a poised foundation for your chosen center stone, framed by two smaller companions that enhance its subtle glow.

Crafted in cool, enduring platinum, the band is polished to a satiny finish that feels weightless on the finger. Its low-profile setting ensures everyday comfort and ease beneath gloves or alongside other stackable bands. Each piece is meticulously hand-finished in our Williamsburg studio, where precision meets thoughtful design.

Choosing a lab-grown diamond for your center stone reflects a commitment to clarity and sustainability without compromise. The ethical origin of the gem aligns with a modern sensibility rooted in responsible craftsmanship.

This ring suits those who appreciate refined elegance with a touch of poetic balance—ideal for hands that favor a graceful silhouette and a design that invites layering. The semi-set style allows you to select a cushion diamond that resonates personally, making the ring uniquely yours.

Resizing is available to ensure a perfect fit, with care instructions provided to maintain the platinum’s soft sheen and the setting’s secure hold.

Visit our Williamsburg studio to explore this semi-set cushion engagement ring in person or begin your custom design journey online. At Haejin Jewelry, we blend expert craftsmanship with ethical values to create lab-grown diamond engagement rings that speak to your story, right here in Brooklyn.

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.