The Peacocks Tail
“The Mirror Of Alchemy” by Roger Bacon, 1250
Whereupon one says, So many colours, so many names.
According to the diverse colours appearing in the work, the names likewise were varied by the Philosophers: whereon, in the first operation of our stone, it is called Putrefaction, and our stone is made black. There appears also before whiteness the peacock’s colour, whereon one says thus, Know you that all the colours in the world, or that may be imagined, appear before whiteness, and afterward true whiteness follows.