Brutalist Modernist Sterling Silver and Faceted Aquamarine/Blue Glass Ring

This is a substantial modernist or Brutalist style ring featuring a large, horizontally oriented rectangular gemstone, likely a pale blue aquamarine, blue topaz, or high-quality faceted glass. The stone is set in a heavy, sculptural silver mounting characterized by organic, flowing curves that form a crown-like bridge over the stone. The metal appears to be sterling silver, indicated by the specific greyish color and the presence of dark tarnish or patina in the recessed areas. The craftsmanship suggests a mid-century to late 20th-century artisan piece (circa 1960s-1970s). The stone's cut is a unique custom step-cut with geometric pavilion faceting visible through the crown. Regarding condition, there is visible heavy oxidation and tarnish throughout the silver setting, along with a notable small orange/brown inclusion or surface deposit on the far left edge of the stone. The metal surface shows minor surface scratches consistent with age and wear, but the overall structural integrity of the heavy-gauge mounting remains intact. No obvious maker's marks are visible from this angle, but the piece displays high-quality hand-fabricated characteristics.

Based on a visual examination of the provided image, I have appraised this Brutalist/Modernist style ring. The piece features a heavy, sculptural silver setting with organic, flowing lines typical of artisan jewelry from the 1960s to 1970s. The large, horizontally oriented geometric blue stone appears to be pale aquamarine, blue topaz, or possibly faceted glass. The silver exhibits significant tarnish and oxidation, which is expected for its age and actually highlights the Brutalist design. There is a noticeable inclusion or surface deposit on the edge of the stone, and minor surface scratches are present on the metal. The overall structural integrity is solid. Market demand for authentic mid-century Modernist and Brutalist silver jewelry remains steady, particularly for substantial, hand-fabricated pieces. Values are heavily dependent on the exact identity of the stone and the presence of any maker's marks. Please note that this appraisal is based solely on photographic evidence. A definitive authentication and valuation would require an in-person examination to test the metal purity, identify the gemstone using gemological equipment, and inspect for any hallmarks or maker's marks not visible in the image.