Lab-Grown Diamond Engagement Ring

Imagine the elongated silhouette of a 12 x 6 mm marquise diamond catching the light with every subtle movement—its tapered points lending a refined drama to the hand. This semi-set solitaire ring foundation in warm 14K yellow gold offers a low-profile setting designed for everyday wear, balancing elegance with comfort. The slender band is gently rounded for a smooth fit that feels natural from morning coffee to evening strolls.

Crafted in our Williamsburg studio, the mounting is meticulously finished to ensure the prongs sit securely while maintaining a sleek profile that slips easily under gloves or alongside stackable bands. Each piece undergoes thorough inspection to meet our standards for durability and refined detail.

Our commitment to ethical jewelry is reflected in the choice of lab-grown diamonds, combining clarity and brilliance with a sustainable origin.

This solitaire base suits those who appreciate architectural grace and desire a ring that integrates seamlessly with an active lifestyle. Its understated height and comfort fit make it ideal for daily wear, whether paired with a wedding band or worn solo.

Should you wish to adjust the fit, resizing is available to ensure the ring complements your hand perfectly without compromising its structure.

Explore this semi-set marquise solitaire in person at our Williamsburg studio or begin your custom design journey online—crafted for life’s intimate moments.

Haejin Jewelry stands as a Brooklyn fine-jewelry studio specializing in lab-grown diamond engagement rings, where expert craftsmanship and ethical sourcing meet the spirit of New York City’s creative heart.

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.