This is a very simple mod that adds four new coins:
And:
None of the coins have a way to be crafted and also the Ruby dosn't have any way to be crafted. You can use a mod of npc to make a perzonalised economy in your server and also you can use other mods to make a craft for the coins and the ruby. Also I supouse that with some mods you can make an economy system in your modpack.

This mod is inspirited in "Ordinary Coins Mod": https://www.curseforge.com/minecraft/mc-mods/ordinary-coins
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