Lab-Grown Diamond Engagement Ring

Light catches the elongated points of a marquise diamond, casting a subtle, tapered glow that draws the eye along the finger’s natural line. This semi-set platinum mounting awaits your choice of a 12 x 6 mm marquise center, designed with a low-profile silhouette that slips comfortably beneath daily gloves and sleeves.

Crafted in platinum for enduring strength and a cool, luminous finish, the setting features delicate accent stones that enhance the center’s dramatic shape without overwhelming it. The band’s refined width balances presence with wearability, while the secure prong arrangement ensures the stone sits confidently close to the hand.

Each piece is meticulously finished and inspected in our Williamsburg studio, where precision meets quiet durability. The lab-grown diamond option reflects a commitment to ethical sourcing and environmental mindfulness, offering clarity and brilliance without compromise.

Ideal for those who appreciate architectural elegance paired with practical comfort, this ring suits slender to medium finger proportions and layers seamlessly with wedding bands or stackable rings. Its modest height and smooth edges make it a natural choice for everyday wear.

Should you need resizing or prefer a custom accent arrangement, our Brooklyn studio offers personalized consultations to tailor the fit and design to your lifestyle.

Explore this semi-set marquise engagement ring in person at our Williamsburg workshop or begin your custom design journey online with Haejin Jewelry, where expert craftsmanship and ethical values shape every creation.

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.