Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated curve of a marquise diamond, casting a slender, luminous shadow across the hand. This semi-set solitaire invites you to select a 6 x 3 mm marquise stone, whose tapered shape lends a graceful, almost poetic silhouette that elongates the finger with quiet elegance.

Crafted in warm 18K yellow gold, the mounting balances classic warmth with a refined profile designed for everyday wear. The slender prongs cradle the stone securely while maintaining a low profile that slips comfortably beneath gloves or alongside stackable bands. Each ring is hand-finished in our Williamsburg studio, where meticulous inspection ensures a smooth comfort fit and flawless polish.

Our commitment to lab-grown diamonds means your ring carries a clarity and brilliance born from sustainable innovation, reflecting a modern approach to ethical jewelry without compromise.

This solitaire suits those who appreciate subtle drama and refined craftsmanship—a piece that feels as natural in a quiet moment as it does in celebration. The semi-set design allows you to choose a center stone that resonates personally, making the ring uniquely yours.

Should you need resizing or guidance on selecting the perfect marquise, our Brooklyn studio offers personalized support to ensure your ring fits seamlessly into your life.

Visit us in Williamsburg or explore custom design options online to begin crafting a ring that speaks to your story with understated beauty.

Haejin Jewelry stands as a Brooklyn-based fine-jewelry studio specializing in lab-grown diamond engagement rings, blending expert craftsmanship with ethical sourcing and a deep connection to New York City’s creative spirit.

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.