Well not quite golden... this one is mostly brass witha bit of anodised aluminium. lightly antiqued and sprayed in celulose laquer to keep it shiny.
The snitch is the crucial element of the game Quidditch in the Harry Potter books and movie, but also plays a critical role at the end of the series 'I Open at the Close'.
The feather/wings are sheet brass, etched both sides with a freehand feather texture and a silver soldered 'stalk'. The base is from a long-gone 'executive toy' abacus!