Final answer:
In 'The Birthmark' by Nathaniel Hawthorne, Georgiana's birthmark is a crimson mark shaped like a tiny hand located on her left cheek.
Step-by-step explanation:
In Nathaniel Hawthorne's short story The Birthmark, the birthmark in question is located on the central part of Georgiana's left cheek. It is described as deeply interwoven with the substance of her face. The mark changes visibility with Georgiana's emotions and complexion, becoming more distinct when she is pale, and resembling a tiny, crimson hand.