50 Pence - Elizabeth II Vampire Bat, Gold Plated Silver

Gibraltar's Wildlife in the Night series leaned heavily into novelty coinage, a market the territory has pursued aggressively since the 1990s when its treasury recognized that collector premiums on themed issues far outpaced any revenue from circulation. The vampire bat issue is struck in .925 silver with a black gold plating treatment — a galvanic process producing the oxidized matte finish — rather than standard yellow gold, a deliberate choice to suit the subject matter.