Where is the element barium found?

Answer 1

Barium (IPA: /ˈbɛːɹiəm/) is a chemical element. It has the symbol Ba, and atomic number 56. Barium is soft silvery metallic alkaline earth metal. It is never found in nature in its pure form due to its reactivity with air. Its oxide is historically known as baryta but it reacts with water and carbon dioxide and is not found as a mineral. The most common naturally occurring minerals are the very insoluble barium sulfate, BaSO4 (barite), and barium carbonate, BaCO3 (witherite).
Because barium quickly becomes oxidized in air, it is difficult to obtain this metal in its pure form. It is primarily found in and extracted from the mineral barite which is crystalized barium sulfate. Barium is commercially produced through the electrolysis of molten barium chloride (BaCl2)

Answer 2

It is found, AFAIK, in the minerals barite and witherite. These have been seen in Italy, Nevada, Poland, Morocco (barite), Illinois, England, Ontario, Germany (witherite). Barite is also found in veins in limestone or hematite.