Lab-Grown Diamond Engagement Ring

Light catches the elongated silhouette of a marquise diamond, its tapered points drawing the eye along a graceful arc. This semi-set engagement ring invites your choice of a 6 x 3 mm center stone, framed by four delicate side stones that echo its refined shape, creating a quiet rhythm of sparkle.

Crafted in cool platinum, the mounting balances strength with subtlety, its low-profile setting designed for everyday wear. Each prong is meticulously shaped and polished in our Williamsburg studio, ensuring the band feels smooth against the skin while securely cradling your chosen diamond.

Our commitment to lab-grown diamonds means your ring carries a clarity and brilliance born from sustainable origins, reflecting a modern approach to ethical jewelry.

The slender band and modest height suit hands that appreciate elegance without excess, pairing effortlessly with wedding bands or stacking rings. Its streamlined form slips comfortably beneath gloves and fits naturally into daily life.

Should you wish to adjust the fit, resizing is available with care to preserve the ring’s delicate balance. Typical lead times accommodate thoughtful customization without rush.

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

Haejin Jewelry stands as a Brooklyn-based fine-jewelry studio specializing in lab-grown diamond engagement rings, blending expert craftsmanship with ethical values and local artistry.

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.