@1138:
Indeed, that specimen has been sputter coated with gold for better visibility. I have categorized that and other similar images, and added a note to it. Thanks @idoric for finding that specimen; there are probably many others that need to be categorized as well.

@Poupoul2:
Many thanks for translating my post! Even though my French is nowhere near what it used to be, I'd say you did a terrific job!