The main source of Viridium Ore is through End Meteorites.
Features
The End Meteorite features a central Endslate and Endrock meteor, along with smaller floating Endstone islands surrounding them, occasionally including End Velvet vegetation.
This meteorite is a source of a high concentration of Viridium Ore. Depending on the six different sized meteors, the more ore you will encounter.
Generation
These End Meteorites generate floating in the void and can be found submerged into the End Island surfaces in the End.