18K White Gold Emerald Diamond Black Agate Cocktail Ring

Square emerald-cut emerald, diamond halo, black agate, and 18K white gold cocktail ring. This bold geometric ring centers a vivid 4.18 carat emerald-cut emerald framed by a fine 0.31 carat diamond halo, set into a sculptural black agate body with polished 18 karat white gold. The strong contrast between the saturated green emerald and glossy black agate gives the piece a dramatic, modern feel while still reading timeless and wearable.

The ring has a substantial weight at 24.16 grams, giving it a solid, luxurious presence on the hand. The emerald is cut in a classic step-cut style, emphasizing the richness and depth of color rather than sparkle alone. The slim diamond halo softens the geometry slightly and adds brightness without overwhelming the center stone.

The black agate mounting creates a sleek “Black Velvet” effect that makes the emerald appear even more vivid. From the side, the ring has a sculptural dome-like silhouette with openwork detailing inside the gallery, showing thoughtful craftsmanship throughout.

A strong statement cocktail ring that works equally well styled casually or formally. Modern, architectural, and collectible.