It turns out that the color of gold can only be explained using special relativity. Another brief article says that if relativity is ignored, gold would be silvery in color.
This isn't a new result but I hadn't heard it before.
Pagination of physical specimens and CSV downloads - I have made some minor modifications to the coin type pages in OCRE, CRRO, etc. A relatively small number of types across these corpora have more than 100 ...
1 day ago