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.

I have conducted a visual appraisal of this mid-to-late 20th-century ballerina-style cocktail ring. The centerpiece is a high-saturation Colombian emerald-cut emerald. The stone exhibits a quintessential 'grass green' color with visible 'jardin' inclusions, which are characteristic of natural emeralds from the Muzo or Chivor mines. The surrounding marquise-cut diamond halo provides a dramatic starburst effect, typical of high-end custom craftsmanship from the 1960s-1980s. The triple-split platinum shank is a mark of quality, designed to stabilize the significant weight of the crown. Condition: The platinum shows a natural patina with minor surface abrasions, suggesting regular wear. The emerald appears well-set but requires a microscopic inspection to rule out significant surface-reaching fissures or clarity enhancements (such as cedar oil or resin), which are standard in the trade but vary in degree. Market demand for Colombian emeralds remains exceptionally high due to their rarity and prestige compared to Zambian or Brazilian stones. Limitations: This appraisal is based on photographic evidence and descriptions. To confirm this valuation, a physical examination is mandatory. Specifically, the emerald must be tested by a laboratory (such as GIA or SSEF) to confirm geographic origin and determine the level of clarity enhancement (Minor, Moderate, or Significant), as this significantly dictates market price. Diamond weights and color/clarity grades are estimated; a full grading report would be required for a definitive insurance replacement value. Despite these limitations, the piece represents a significant specimen of period luxury jewelry.