Nobody said so, but it is 90% silver. So if you don't want it, sell it for at least the price of silver. Probably not much more given the amount of wear.
Great find! https://en.numista.com/catalogue/pieces37869.html I'd keep it not only for the story behind it, but also for the historical significance. The Republic of Nueva Granada was a transitional state between the Spanish colony of Nueva Granada and present day Colombia. So you also have a coin of a no-longer-existing issuing authority (some collectors focus on such things).
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