Couldn't resist this, a single vintage high carat gold hoop earring, and sitting on the hoop a silver mouse, his tail coiled around the hoop in the style of Thornhill, but a much more modern version.
He is well modelled  with detailed paws and fur, and tiny pearls for eyes.
 
measures 26mm diameter
weighs - 1.9g
Date - 1980s - 90s?
 
Excellent condition