Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated silhouette of the marquise diamond, casting a delicate shadow that dances with every movement. This solitaire engagement ring, set in cool platinum, frames an 8 x 4 mm marquise stone with precision and grace.

Handcrafted in our Williamsburg studio, the ring features a slender, low-profile platinum band that balances strength with subtlety. The prongs cradle the diamond securely while allowing light to flood its tapered facets, enhancing the stone’s signature brilliance and dramatic shape. The smooth comfort fit ensures it rests gently against the finger, ideal for daily wear without interruption.

Each lab-grown diamond is chosen for its clarity and ethical origin, reflecting a commitment to sustainability without compromise on beauty. The platinum setting’s enduring luster complements the stone’s glassy, tapered elegance, creating a refined silhouette that suits hands seeking a blend of modern geometry and classic allure.

Designed for those who appreciate artisan craftsmanship and a ring that slips easily beneath gloves or stacks effortlessly with other bands, this piece invites quiet admiration. Resizing is available to ensure a perfect fit, crafted with care in our Brooklyn workshop.

Explore this marquise solitaire in person at our Williamsburg studio or begin your custom design journey online—where thoughtful design meets ethical luxury.

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