Lab-Grown Diamond Engagement Ring

The elongated silhouette of the marquise diamond, measuring 12 by 6 millimeters, draws the eye with its graceful taper and subtle drama—an invitation to linger on the hand’s natural lines.

Crafted from warm 18K yellow gold, this semi-set engagement ring foundation features delicate accent settings designed to complement your chosen center stone. Each curve and prong is shaped and polished in our Williamsburg studio, ensuring a smooth, low-profile fit that rests comfortably for daily wear without catching.

Our commitment to lab-grown diamonds means you can embrace brilliance with a clear conscience, knowing your ring reflects both beauty and sustainability.

The gentle arch of the band suits those who appreciate artisan detail and a refined silhouette, especially flattering on slender fingers or as part of a carefully curated stack. Its modest height allows for glove-friendly wear and ease of movement.

Should you need resizing, we handle adjustments with precision to maintain the integrity of the setting and finish.

Explore this semi-set marquise ring in person at our Williamsburg studio or begin your custom design journey online—where craftsmanship meets intention.

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 local artisan 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.