license of your choice. English https://commons.wikimedia.org/wiki/File:Potassium.JPG object has role: photographer author name string: Dnn87 Wikimedia username:
DescriptionPotassium.jpg English: Potassium pearls under paraffin oil, the largest pearl is 0.5 cm big. Deutsch: Kaliumperlen unter Paraffinöl, die größte