Lab-Grown Diamond Engagement Ring

Sunlight catches the soft, rounded corners of a 12 x 12 mm cushion diamond, its gentle glow unfolding like a quiet promise. This semi-set solitaire ring invites you to choose a center stone that balances vintage warmth with modern clarity.

Crafted from 18K white gold, the band offers a cool, luminous backdrop that enhances the diamond’s subtle fire. The setting’s delicate prongs hold the stone securely while maintaining a low profile, designed for everyday grace and comfort. Each curve is polished by hand in our Williamsburg studio, ensuring a smooth fit that feels like a natural extension of the hand.

Our diamonds are lab-grown, reflecting a commitment to ethical sourcing and environmental mindfulness without compromising brilliance or character.

This solitaire suits those who appreciate understated elegance and desire a ring that layers effortlessly with wedding bands or stackable pieces. Its modest height slips easily beneath gloves and rings, making it a seamless companion to daily life.

Should you need resizing, we handle adjustments with care to preserve the ring’s refined silhouette and finish.

Explore this semi-set cushion solitaire in person at our Williamsburg studio or begin your custom design journey online—crafted for the moments you’ll live in.

Haejin Jewelry stands as a Brooklyn-based fine-jewelry studio specializing in lab-grown diamond engagement rings, blending expert craftsmanship with ethical values and a local, hands-on 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.