Here is a brief description of caesium. It is silvery white, soft, and ductile. It is the most electropositive and most alkaline element. Caesium, gallium, and mercury are the only three metals that are liquid at or around room temperature.
Caesium hydroxide is a strong base and attacks glass.
Strange Matter cartoon included by kind permission of Nick Kim at the University of Waikato , New Zealand. Here is a brief summary of the isolation of caesium. Caesium is not made by the same method as sodium as might have been expected. This is an equilbrium reaction and under these conditions the caesium is highly volatile and removed from the system in a form relatively free from sodium impurities, allowing the reaction to proceed. It can be purified by distillation.