Vintage Sterling Silver Light Blue Chalcedony Oval Cabochon Ring Size 8

Sterling silver ring set with a smooth oval cabochon in soft periwinkle/sky blue, consistent with blue chalcedony or blue agate. Distinctive ribbed or fluted architectural shoulders flanking both sides of the bezel setting. Simple square-profile shank. Heavy patina and tarnish to the silver exterior — will polish to a bright finish. Stone is a clear, even pale blue with good translucency.  Material: Sterling silver — please confirm interior hallmark Stone: Oval cabochon — light periwinkle/sky blue, likely blue chalcedony or blue agate Setting: Bezel set with ribbed/fluted architectural shoulders Ring Size: 8 Condition: no chips or cracks; wear consistent with age, just needs a good polishing!