Infinity Coins

Infinity Coins is a mod mostly targeted at Server Administrators who wish to add a visual representation of currency (hands-on items) into their server. It adds 5 new coin items, Copper Coin, Silver Coin, Gold Coin, Emerald Coin and Corundum Coin

Each coin tier (except the Corundum Coin) can be converted to its immediate higher tier coin by combining 8 of them in a recipe:

Similarly each coin tier (except the Copper Coin) can be converted back to 8 of its immediate lower tier coins in a shapeless recipe:

Finally, players can craft 8 Gold Coins using 4 Gold Ingots

As of version 1.0.1, killing a mob has a variating chance of dropping Coins as loot.
As of version 1.0.2, coins can be found in Dungeon Chests.