9K Yellow Gold Vintage Opal and Diamond Halo Cluster Ring
Ring (Cocktail/Cluster) · Yellow Gold alloyed with copper and silver to achieve a classic warm bronze-yellow tone.
Purity: 9K (375 fineness), representing 37.5% pure gold content commonly used in British historic jewelry for durability.
Type
Ring (Cocktail/Cluster)
Purity
9K (375 fineness), representing 37.5% pure gold content commonly used in British historic jewelry for durability.
Gold Type
Yellow Gold alloyed with copper and silver to achieve a classic warm bronze-yellow tone.
Weight
Estimated 2.5 - 3.5 grams based on the dainty band profile and substantial cluster head.
Description
A charming vintage cluster ring featuring a vibrant opal centerpiece surrounded by a shimmering halo of accent diamonds. The ring features a knife-edge shoulder design that draws the eye toward the elevated gallery, emphasizing the colorful fire within the opal.
Key Features
Tapered shoulders, illusion prongs common in mid-century British jewelry, and a complete set of internal shank hallmarks.
Color & Finish
Warm, buttery yellow gold with a high-polished finish on the shank; visible light patina in crevices of the gallery.
Hallmarks & Stamps
Full British hallmarks: '375' (standard), Anchor (Birmingham Assay Office), and likely a date letter and maker's mark within rectangular cartouches.
Dimensions Estimate
Likely US size 6-7 (approx. 16.5-17.3mm inner diameter); band width tapers from 2mm to approx. 4mm at the shoulders.
Gemstones & Inlays
Center oval/round natural Cabochon Opal with play-of-color, surrounded by a halo of small white accent diamonds (likely Single or Rose cut).
Clasp & Closure
Not applicable (Ring).
Chain & Links
Standard tapered 'D' shape band profile reaching a raised basket gallery characteristic of mid-20th-century cluster designs.
Craftsmanship Details
Cast gold construction with hand-set stones; the gallery features 'scalloped' or 'pierced' detailing to allow light to enter the opal from below.
Authentication Indicators
The presence of a deep, struck British hallmark '375' is a primary indicator of genuine 9K gold; setting construction is consistent with the era.
Origin & Maker
Originating from the United Kingdom (Birmingham) identified via the anchor assay mark; maker's mark is partially obscured but indicates a commercial jeweler.
Era & Period
Mid-Century Modern / Retro (1950s-1970s). The design mimics earlier Victorian cluster styles but uses modern 9K casting techniques.
Age Estimate
Circa 1960-1980, based on the specific hallmark configuration and the style of the illusion-style diamond settings.
Cultural Significance
Represents the post-war boom in affordable gemstone jewelry, where traditional aristocratic designs were miniaturized for the growing middle class.
Condition Notes
Very Good. The opal shows no visible crazing; the gold has minor micro-scratches consistent with gentle wear; hallmarks remain legible.
Value Estimate
Melt value is low (approx. $50-$80), but retail/resale value is $250-$450 based on the gemstone appeal and vintage desirability.
Care & Maintenance
Opals are delicate (5.5-6.5 Mohs scale); avoid ultrasonic cleaners, chemicals, and extreme temperature changes. Clean with a soft, damp cloth only.
Similar Items
Victorian 18K Opal clusters (more ornate/higher gold value), Modern 14K Opal solitaires (more minimalist/North American style).
Interesting Facts
Opals were highly favored in 9K settings during the mid-20th century in England as affordable luxury for anniversary and birthday gifts (October birthstone).