15.48ct Opal and Platinum Ring
This exquisite piece of fine jewelry features a substantial 15.48-carat oval cabochon cut natural opal as its centerpiece. Found within a high-quality platinum mounting, the opal exhibits a soft, milky white-to-translucent base body color with a vibrant 'play-of-color' consisting primarily of green, yellow, and subtle orange pinfire and broadflash flashes. The gemstone is secured by a six-prong setting, ensuring the large stone remains stable. The shank is constructed of polished platinum and features intricate openwork detailing on the shoulders, likely embellished with small accent diamonds typical of mid-to-late 20th-century craftsmanship. Interior markings on the band include a 'PM900' stamp, indicating a high-purity platinum alloy (90% platinum), alongside other discernible maker's marks or serial numbers. The overall condition appears excellent with minimal surface abrasions to the opal and a well-maintained polished finish on the metal. The massive scale of the opal suggests it is a premium collector-grade stone, likely of Australian origin. The ring represents a classic cocktail style, prioritizing the size and spectral brilliance of the central opal.
AI-Generated Appraisal Disclaimer
Estimated Value
$4,500 - $6,500
Basic Information
Category
Fine Jewelry - Rings
Appraised On
March 14, 2026
Estimated Value
$4,500 - $6,500
Item Description
This exquisite piece of fine jewelry features a substantial 15.48-carat oval cabochon cut natural opal as its centerpiece. Found within a high-quality platinum mounting, the opal exhibits a soft, milky white-to-translucent base body color with a vibrant 'play-of-color' consisting primarily of green, yellow, and subtle orange pinfire and broadflash flashes. The gemstone is secured by a six-prong setting, ensuring the large stone remains stable. The shank is constructed of polished platinum and features intricate openwork detailing on the shoulders, likely embellished with small accent diamonds typical of mid-to-late 20th-century craftsmanship. Interior markings on the band include a 'PM900' stamp, indicating a high-purity platinum alloy (90% platinum), alongside other discernible maker's marks or serial numbers. The overall condition appears excellent with minimal surface abrasions to the opal and a well-maintained polished finish on the metal. The massive scale of the opal suggests it is a premium collector-grade stone, likely of Australian origin. The ring represents a classic cocktail style, prioritizing the size and spectral brilliance of the central opal.
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