Where in nature are elments oxygen sulfur selenium tellurium polonium found?

Oxygen is a component of air (21 %) and of many oxides.
Sulfur is a component of many sulfides, sulfates, hydrogen sulfide.
Selenium are frequently associated with sulfur ores.
Tellurium exist as tellurides, tellurites or tellurates but it is a rare element.
Polonium exist in traces in uranium or thorium ores.