Rare Earths
In 1885 von Welsbach used a method he developed himself to separate didymium for the first time. He saw several different colored versions which he named "praseodymium" (green) and "neodidymium" (pink); the latter then became the more common name for the element, neodymium.
Read more about this topic: Carl Auer Von Welsbach
Famous quotes containing the word rare:
“Well, for us, in history where goodness is a rare pearl, he who was good almost takes precedence over he who was great.”
—Victor Hugo (1802–1885)