What is the Chrysalis Stage?

I know have briefly mentioned the word "chrysalis" in other posts and noted that my caterpillar was in this very important stage of his butterfly life cycle. There is not much information on this stage, as it is not even known to scientists how this process happens or what exactly takes place while the caterpillar is in the chrysalis. During the next ten to twelve days, the caterpillar will undergo numerous changes to completely transform into a butterfly. Heraldo will even become a liquid during this stage. At the very beginning, it was clear that there was still a caterpillar in the chrysalis but by the third day the chrysalis seemed to have fully hardened and Heraldo turned into a liquid.