Praseodymium
Discovered : by Baron Auer von Welsbach in 1885

Isolated in Vienna, Austria

Origin : The name is derived from the Greek ‘prasios didymos’, meaning green twin.

Description :

A soft, silvery metal used in alloys, as flints for pocket lighters, and for the yellow visor glass used to protect welders.

Image :

Green Gemini. Click here to see larger version of this image.