This is a beautiful Art Deco Ring. Not quite sure what to call the light Amber toned Topaz Stone. 
The Art Deco Mounting is original to the stone 
Sold as Shown. When worn the underside damage to the stone is not noticeable
The stone is about 20mm x 15mm and stands out about 10mm from your finger. The band at the back is about 3.49 mm and weight about 8.2 grams
 Ships carefully packaged and insured.