Here are some local, living examples:
The chafer beetle Hoplia caerulia, photographed near Candes Saint Martin.
A peacock at the Chateau de Rivau, near Chinon.
A male Adonis Blue Polyommatus bellargus on one of my butterfly survey transects.
Fossils of this irridescent reed beetle Plateumaris sericea and other closely related species have been found in Japan. These rather lively ones were photographed in the Brenne.