Which element was the last naturally discovered element?

Rhenium is usually described as the last naturally occurring element to be discovered, identified in 1925. It was isolated by Walter Noddack, Ida Tacke, and Otto Berg and named after the Rhine River. Although synthetic elements continued to be created later, rhenium was the final naturally occurring stable element added to the periodic table. It is used in high-temperature superalloys and catalysts because of its remarkable heat resistance.