The Coinage of Oerth

Most trade is done with silver and gold pieces. These pieces are just basically raw nuggets of either. In market they are usually weighed out on the spot. Buyers have to beware of foolsgold and foolssilver.

Cities of Mardule are able to use a powerful Quest Miracle which allows them to mint coins. These coins are always of exact gold, silver, or platinum weight and do not need to be weighed in market. Also, since the mint symbol is impossible to create without the Quest miracle, fools gold and fools silver coins are not possible.

Minted coins have particular symbols on them and have various magical effects if enough coins are held. The magical effects only work if the coins are gained by purchasing something (winning a bet counts as 'chances' were actually purchaced by wager). The magical effects only last a week for that person. If the coins are then traded away to someone else they will function for that new person for 1 month, etc.

Terminology:
'Crowns' refer to gold coins (have symbol of leadership).
'Royals' refer to Platinum coins (have face of ruler).
'Paupers' refer to copper coins which are practically worthless and no longer minted after the Dark times.
 
 
City Metal Symbol Effect (50 coins+)
Rel Mord silver two wrestlers / Rel Mord attackers at -1 on all rolls
silver cattle heard / Rel Mord +5% reaction adjust
gold  Gilgamesh wrestling bull of heaven/ Crown of Nyrond -25% chance of encounter with bandits
gold Battle of Fortnight/ crown of Nyrond defenders +1 on melee/attackers -1
platinum fountain of youth & river of life/face of Gilgamesh +1 day to lifespan
Leukish silver lush mountains/ Leukish +1 merchant skill
silver river valley/ Leukish
gold crossed foils/ Laurel wreath crown of Urnst +5% luck
platinum  Church of Marduke /Face of Duke 5% M.R. (doesnt add)
Rhadighast silver fishermen on boats with nets/Rhadighast city +1 fishing skill
gold countess battling barbarians/ wreath crown +2 on melee dex checks
platinum Raised walls of Rhadighast/Face of Countess 20% Protection from Evil
Dyvers silver spinning loom/Dyvers +1 merchant skills
gold Battle of Emridy Fields/Crown of Furyondy
platinum St Cuthbert/Face of King Thromell II
Rouxes silver aquaducts/Rouxes
gold Three Princes hung from tree/Overcrown
gold /Overcrown
platinum /Face of Overking
platinum /Face of Overking
Mithril

Old coins not common...