From the local estate of a lady who bought jewelry online, this is a vintage  size 10 sterling ring by Nicky Butler in the shape of a coiled snake or serpent.   From his Nature Collection, it appears to be retired and out of stock.  It is set with one 4mm turquoise cabachon, one tiny green stone in the eye and 8 prong set faceted sky blue topaz stones.     I seriously doubt that it was ever worn since the condition is  pre owned excellent.