Lab-Grown Diamond Engagement Ring

The elongated silhouette of the marquise diamond, measuring 8 by 4 millimeters, draws the eye with its tapered points and graceful drama, subtly elongating the finger. This semi-set solitaire ring foundation in warm 18K yellow gold offers a low-profile setting designed for everyday wear, balancing secure prongs with a slim band that feels light and unobtrusive on the hand.

Each piece is meticulously crafted in our Williamsburg studio, where the gold is hand-finished to a smooth comfort fit, ensuring the band slides on effortlessly without catching. The mounting’s refined geometry supports the stone with precision, allowing light to dance through the marquise’s facets for a lively sparkle that remains understated.

Our commitment to ethical jewelry shines through the use of a lab-grown diamond, chosen for its clarity and sustainable origin, reflecting a modern approach to responsible luxury.

Ideal for those who appreciate architectural elegance paired with practical design, this ring suits slender to medium finger sizes and layers well with stackable bands or wedding rings without bulk. Its low profile also makes it glove-friendly and unobtrusive for daily routines.

Should you need resizing or prefer a custom stone, our team in Brooklyn can guide you through the process with care and transparency.

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 with quiet confidence.

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 dedication to thoughtful, wearable design.

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.