[vintage] Sterling Silver Vibrant Blue Gemstone Art Deco Ring - Size 7

Vintage Sterling Silver Vibrant Blue Cat’s Eye Gemstone Ring - purchased at an estate sale years ago. Well cared for since, with normal signs of wear. Oval-shaped stone measures approximately 15mm x 7mm (3.5mm depth). This ring is a size 7 (see photos of ring mandrel) & weighs approximately 3g. Band width of approximately 2mm. 
Stamped STERLING (see photos). Photos taken in artificial lighting. 
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