This mod adds a new virtual and item currency called ruby's.
With ruby's you can setup player shops,
Convert it into experience
Create enchanted books
And exchange valuable items for ruby's
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To get started in this mod first find ruby's in a cave they spawn in the same level as gold,
Craft a ruby card allowing you to view your ruby account
Ruby exchange where you can turn materials like diamond, emeralds and others into ruby's directly added to your account.
There are many other ruby type exchange blocks you can craft.