Lab-Grown Diamond Engagement Ring

Light catches the elongated silhouette of a marquise diamond, its tapered points tracing a delicate arc that seems to cradle the hand. This semi-set platinum band awaits your choice of a 9 x 4.5 mm center stone, offering a refined stage for the marquise’s signature blend of drama and grace.

Crafted in platinum, the mounting balances strength with subtlety, its low-profile setting designed for everyday wear without sacrificing presence. The smooth shank curves gently, promising comfort and a secure fit that slips easily beneath gloves or alongside other bands.

Each piece is finished by hand in our Williamsburg studio, where precision meets quiet artistry. The platinum’s cool sheen complements the marquise’s glassy facets, while expert inspection ensures every detail aligns with our exacting standards.

Choosing a lab-grown diamond here means embracing clarity and brilliance with a lighter environmental footprint—an ethical choice woven into the ring’s very foundation.

This solitaire silhouette suits those who appreciate a statement that is both elegant and personal, especially flattering on slender fingers or when stacked with complementary bands. Its streamlined profile invites daily wear, from Brooklyn’s cobblestones to quiet moments at home.

Should you need resizing or guidance on selecting the perfect stone, our studio offers thoughtful support tailored to your timeline and style.

Visit us in Williamsburg or explore the design process online to bring your vision to life with a ring that reflects both your story and our craft.

Haejin Jewelry stands as a Brooklyn fine-jewelry studio dedicated to lab-grown diamond engagement rings, blending ethical craftsmanship with local expertise to create pieces made for life’s most meaningful moments.

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.