I absolutely love chocolate! Do you like? It is actually made of liquid cocao! 
I love it!  How is it made?
Well Cacao nibs are fermended seeds of the cacao tree... the shells are removed and then are ground into powder. 
They are fermented? I didn't know that. Is there roasting involved at some point?
Yes, actually, after being fermented they are dried, cleaned and then, like you said,  roasted