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 10 x 5 mm marquise center stone with architectural grace.

Crafted in Williamsburg, the band’s smooth finish and subtle taper ensure comfort for daily wear, while the halo setting adds a delicate border of sparkle without overwhelming the stone’s distinctive shape. The platinum’s cool tone enhances the diamond’s clarity, and the mounting’s precision engineering keeps the profile close to the hand, making it glove-friendly and ideal for stacking with complementary bands.

Each piece reflects our commitment to ethical jewelry, featuring lab-grown diamonds that combine sustainability with exceptional clarity and fire. This ring’s design suits those who appreciate refined geometry and a confident yet understated statement.

Resizing is available to ensure a perfect fit, and our Brooklyn studio welcomes you to explore custom options or complete your ring with a center stone chosen for your unique story. Lead times are typically four to six weeks, allowing for meticulous craftsmanship.

Visit us in Williamsburg or begin your custom design journey online with Haejin Jewelry, where expert craftsmanship meets ethical innovation in the heart of Brooklyn.

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.