In excellent condition. 

A central amethyst cabochon, Foliate engraved halo and pierced chased fretwork shoulders. 
The shank is almost plain, concave in the centre. Plenty of excellent work in this ring and the amethyst is very deep and clear
There are marks inside the ring which are probably in Arabic.  
Very attractive ring but not as old as it looks, probably 1960's . 
Well made and constructed. 
Weight 3.33 gm . 
Size  0 1/2 UK 9 7 1/2 US) amethyst cabochon, Foliate engraved halo and pierced chased fretwork shoulders. 
The shank is almost plain. 
There are marks inside the ring which are probably in Arabic.