Perfectly proportioned, this is screaming out to be worn on your little finger. There's something so satisfying to me about a chunk of black stone set into yellow gold. 
 
I've now got Black and Gold by Sam Sparrow in my head...
 
Material - 9ct gold and onyx
Hallmarks - Birmingham 1977
Country of origin - England
Size - UK G.5 / US 3.5
Length of face - 1.1cm
Width of face - 9mm
Weight - 2.8g
Condition - excellent vintage condition with no wear to note.