The Nehusi

Thank you so much!

Just curious if anyone here knows what the medium of exchange would have been in Nubia/Kush? I get the gist of international trade but as far as domestically, how did Nubians/Kushites trade amongst each other preferably in kerma/Napata/Meroe prior to Christianity? I know there's evidence of Egyptian coins being in circulation in lower Nubia but no evidence of home minted coins. With gold being in abundance, you would think that would be the medium of exchange but I've yet to find evidence to prove this theory. Does anyone have any clue? I just find that bartering might have been inconvenient , especially with how advanced Nubians/Kushites were.