Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated silhouette of a marquise diamond, casting a slender, confident shadow across the hand. This semi-set engagement ring invites you to select a 9 x 4.5 mm marquise stone, known for its dramatic taper and ability to visually lengthen the finger with elegant precision.

Crafted from warm 18K rose gold, the band’s smooth, low-profile design balances modern minimalism with structural clarity. Accents along the shank add subtle brilliance without overwhelming the diamond’s architectural form. Each ring is meticulously finished in our Williamsburg studio, ensuring a comfort fit that wears seamlessly day to day.

Our commitment to lab-grown diamonds reflects a thoughtful approach to ethical jewelry, offering clarity and sustainability without compromise.

The slender shape and moderate size suit those who appreciate refined geometry and a ring that layers well with other bands or stands alone with quiet confidence. Its low profile makes it glove-friendly and ideal for daily wear.

Should you need resizing or prefer a custom accent arrangement, our Brooklyn studio offers personalized consultations to tailor your ring with care and precision.

Explore this semi-set marquise engagement ring in person at our Williamsburg studio or begin your custom design journey online, where expert guidance meets thoughtful craftsmanship.

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 modern design ethos rooted in 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.