The difference between the coins is the density of precious metals; Zera’s precious metal is Pitchsteel and Ran’s Precious Metal is Rosenite. For example, a 100 Zera coin will have double the density of Pitchsteel than a 50 Zera coin. 

Zera is an old currency that’s been around since before the time of the Ancients, invented by the Kamina who have been trading it with the Voma before the time of the Roots of Annihilation. 

As new civilisations forged in Aultora’s realms, the currency travelled and was used primarily for trading amongst the people. 

Whilst the Dralic usually keep to themselves, they still receive shipments of goods from the mainlands; giving them the opportunity to trade with Zera and Ran amongst themselves and with foreign merchants. 

Over time the precious metals used for the coins have changed; Pitchsteel is a dark metal and is used to represent the time of the Ancients, a historical time that scarred Aultora, remnants of which remain today. The Rosenite is a soft rose colour and represents the blood of those lost before the Roots of Annihilation and rebirth of new life after.

There are some who try to forge the currency, making it essential for traders and merchants to weigh the currency against special weights to make sure the coin has the correct density of precious metals. Those who try to melt down smaller Zera to make the higher density coins usually fail since the more times the precious metals are melted the less dense they become and the lighter the coin is, making it almost impossible to replicate. Not to mention the moulds used to make the coins have a special quality to them, a secret kept between the merchants.