This question already has an answer here:
Is it possible to break a Horcrux? I don't mean destroy, but if a glass cup is a Horcrux, will it still be whole after it drops from a great height? And then what happens to the Horcrux if it ís broken? If the glass is broken and 7 different people take the shards to their respective homes, who will have the Horcrux?
I got fascinated by this when I was thinking about the placement of a human's soul. When a person loses his arm, he will still be himself, so he still has a soul, same with legs, hair etc., but it's different with the heart and brain.