Here is a fabulous, large Sterling silver ring by the Danish modernist master Niels Erik From (see bio).  It features a very large polished variegated jasper stone.  It also has a split shank to allow the ring to be adjusted to several finger sizes. 

Condition:Excellent, no visible damage

Marks:  N.E.From (script signature) 925S, Sterling, Danmark

Size: top of ring is 3 cm (1.1") long.  Ring shank is split and thus adjustable, currently resting at  UK M , US 6.5, Eu 53, but will expand to at least size P

Year: 1950s