Lab-Grown Diamond Engagement Ring

When light catches the elongated silhouette of a marquise diamond, it creates a striking interplay of brilliance and shadow that draws the eye along the finger’s natural line. This semi-set halo engagement ring foundation in polished platinum offers a secure, low-profile frame designed to showcase a 9 x 4.5 mm marquise center stone with architectural grace.

Crafted for everyday wear, the platinum band balances durability with refined comfort, its smooth interior contour easing onto the hand without bulk. The halo setting’s precise prong work ensures the diamond sits close to the band, reducing snag risk while amplifying sparkle through a delicate surround of smaller stones.

Each piece reflects a commitment to ethical sourcing, featuring lab-grown diamonds that deliver clarity and fire with a lighter environmental footprint. This ring’s silhouette suits those who appreciate a blend of bold geometry and subtle practicality—ideal for slender fingers or anyone seeking a statement that remains understated in daily life.

Adjustments to fit are handled expertly in-studio, with typical lead times that respect your timeline without compromise. Whether layered with complementary bands or worn solo, its streamlined profile invites versatile styling.

Explore this semi-set halo ring in our Williamsburg studio or begin your custom design journey online, where expert guidance meets Brooklyn craftsmanship.

Haejin Jewelry stands as a Brooklyn-based fine-jewelry studio specializing in lab-grown diamond engagement rings, combining ethical craftsmanship with technical precision 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.