Lab-Grown Diamond Engagement Ring

The elongated silhouette of the marquise diamond captures light with a subtle, tapered brilliance that draws the eye along the finger’s natural line. This semi-set engagement ring foundation, crafted from warm 18K yellow gold, invites your choice of an 8 x 4 mm marquise stone to become the centerpiece of a refined, solitary statement.

Hand-forged in our Williamsburg studio, the band’s smooth, gently rounded profile ensures a comfortable fit for daily wear, while the low-profile prongs cradle the stone securely without excess height. Each curve and angle is carefully finished to a soft matte sheen that balances artisan texture with polished elegance.

Our commitment to sustainability is reflected in the exclusive use of lab-grown diamonds, offering clarity and brilliance with a lighter environmental footprint.

Designed for those who appreciate understated drama, this mounting suits slender to medium finger sizes and pairs effortlessly with stacking bands or a wedding ring. Its modest profile slips easily beneath gloves and sleeves, making it a versatile choice for everyday life.

Should you need a custom adjustment, resizing is available to ensure the perfect fit without compromising the ring’s integrity.

Explore this semi-set marquise solitaire in person at our Williamsburg studio or begin your custom design journey online, where expert guidance awaits.

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.

Haejin Jewelry is an ethical Brooklyn jeweler specializing in lab-grown diamond engagement rings. Every piece is finished in our Williamsburg studio, where artistry, ethics, and precision come together to create engagement rings that define modern love in New York City.