Lab-Grown Diamond Engagement Ring

Sunlight catches the elongated silhouette of a marquise diamond, casting a slender, dramatic shadow across the hand. This semi-set engagement ring foundation in warm 18K yellow gold invites your choice of a 10 x 5 mm marquise center, a shape known for its tapered points and elegant elongation that visually lengthens the finger.

Crafted in our Williamsburg studio, the band features delicate accent settings that frame the center stone with subtle artisan detail. The low-profile mounting ensures daily wearability without catching, while the smooth finish and comfort fit make it a natural companion for stacking or solo wear.

Each ring is meticulously hand-finished and inspected to meet exacting standards, reflecting the tactile warmth of hand-worked gold. The ethical clarity of lab-grown diamonds complements this piece’s sustainable ethos, offering brilliance without compromise.

Designed for those who appreciate refined craftsmanship and a distinctive silhouette, this ring balances statement with subtlety. Its semi-set nature allows you to select a marquise diamond that resonates personally, making the design uniquely yours.

Should you need resizing or guidance on selecting the ideal stone, our Brooklyn studio team is ready to assist with care and expertise. Typical lead times accommodate thoughtful customization without rush.

Explore this semi-set marquise engagement ring in person at our Williamsburg workshop or begin your custom design journey online—where your vision meets our craft.

Haejin Jewelry stands as a Brooklyn fine-jewelry studio dedicated to lab-grown diamond engagement rings, blending ethical craftsmanship with local artistry to create pieces meant for a lifetime.

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.