The figure of speech used in the excerpt is a metaphor, comparing contentment to a stone.
Metaphor is the figure of speech used in the excerpt from Emily Dickinson's poem 'After Great Pain, A Formal Feeling Comes' where she describes contentment as 'like a stone.' A metaphor directly compares two unrelated things to imply a similarity without using 'like' or 'as.' In this case, Dickinson is likening contentment to the hardness, solidity, and immovability of a stone.
https://brainly.com/question/37400292