Colombian Emerald and Marquise Diamond Platinum Cocktail Ring

This is a sophisticated mid-century to late 20th-century cocktail ring featuring a prominent central Colombian emerald. The emerald is emerald-cut, displaying a vibrant, saturated 'grass green' hue characteristic of high-quality Colombian origins. It is secured by four substantial platinum prongs. Surrounding the center stone is a tiered 'ballerina' or starburst halo composed of several marquise-cut diamonds, each held in individual prong settings that flare outward to create a dynamic, floral-like silhouette. The metal is identified as platinum, exhibiting a cool, greyish-white luster. The shank of the ring is notable for its triple-split wire design, which converges at the base but provides a wide, supportive foundation for the heavy crown. Physically, the piece shows signs of age and wear; the platinum surfaces exhibit light scratching and a duller patina consistent with regular use. Some of the diamond facets show minor abrasions, and the emerald displays typical internal 'jardin' inclusions, which are expected in natural beryl. The craftsmanship indicates custom bench-work, likely dating from the 1960s to 1980s, prioritizing structural integrity for these precious high-carat stones. No visible maker's marks are discernible from this angle, though the high-quality setting and gemstone choice suggest a luxury manufacturer.