Eclipse Coins
After extensive searching, I couldn't find a mod for Minecraft 1.14 that added a proper currency system to the game. So I decided to create my own implementation of this idea.
Technical Specifications
The mod is developed exclusively for Forge 1.14. Fabric support is not planned.
Coin Types
The modification features 5 types of coins, with 4 available in survival mode:
Stone Coin

Iron Coin

Gold Coin

Eclipse Coin

Creative mode only:
Phasing Eclipse Coin

Denomination System
Basic coins (stone, iron, gold) have different storage forms:
Single Coin = 1 coin
Coin Pile = 5 coins
Coin Stack = 5 piles = 25 coins
Coin Bundle = 4 stacks = 20 piles = 100 coins
Crafting Recipes
All recipes for creating and converting coins:
Creating a Pile:

Creating a Stack:

Creating a Bundle:

Recipes for version 2.1+:
Unstacking:

Version Information
Version 1.* will not be added as they belong to the testing phase and contain confirmed bugs.