Erbium metal is a common Lanthanides metal
Erbium metal is used for amplifiers in optical fibers and therefore is very important for the internet and the transcontinental data transfer. Erbium oxide can double the intensity of optical light under certain conditions and so allows the signal to travel long distances without fading. This is a good example of how a neglected and mostly unknown element can certainly become very popular for a single special qualification
High purity Erbium metal shiny single piece 99.99% casted in acrylic cube. Pure Erbium metal element 68 sample of the periodic table.
Pure Erbium metal sample for element collection