Vintage Purple Glass Intaglio Ring

This is a statement cocktail ring featuring a large, domed circular cabochon made of translucent purple glass. The glass displays a three-dimensional floral motif, likely created using an intaglio or reverse-carving technique, where the design is etched into the back of the glass and filled with a white paint or frosted finish to create a high-contrast 'cameo' effect against the deep violet background. The botanical design appears to depict maple leaves or similar foliate patterns. The ring head is substantial, measuring approximately 25-30mm in diameter. The construction appears to be costume jewelry from the mid-20th century, possibly the 1950s or 60s, reflecting the era's taste for bold, oversized glass accessories. The surface of the glass shows some light surface scratches and minor abrasions consistent with age and occasional wear. The band and setting are obscured from view but given the style, they are likely base metal with a silver or gold-toned plating. The level of craftsmanship in the internal carving suggests a higher-end costume piece, as the details of the leaves are crisp and well-defined, capturing light effectively through the domed surface.

I have conducted a visual examination of the Vintage Purple Glass Intaglio Ring. This piece is a classic example of Mid-Century costume jewelry, likely originating from Western Germany or Austria during the 1950s-1960s. The 'reverse carved' intaglio technique, featuring a frosted foliate motif, is characteristic of the high-quality glasswork exported during this period. The condition appears 'Very Good' for its age; while I note minor surface abrasions on the dome, the internal carving remains crisp and clear with no visible 'flea bites' or significant chipping around the bezel set. The market for mid-century cocktail jewelry remains steady, particularly for substantial statement pieces with botanical themes. Comparables for unsigned glass intaglio rings in similar condition typically realize $45-$95, though the vibrancy of the amethyst hue and the size of this specific dome elevate its potential to the higher end of the range. However, value is capped by the likely base metal composition. A physical inspection would be required to identify any obscured maker's marks (such as 'W. Germany') and to test the metal for sterling silver or gold-filled content using acid or XRF testing, which could double the valuation. Without physical handling, I cannot definitively assess the stability of the foil backing—if present—which often deteriorates over time. Full authentication of the glass manufacturer (e.g., Neiger Brothers or similar cottage industries) would require documented provenance or matching to known catalog records.