Silver coins they were used from ancient time and its considered oldest mass form the coinage. Silver coins are one of the most popular ways to bypass against price increase and balance selected risk in the financial services.
During ancient Greeks the famous Drachmas were minted as a silver trade coin. This means that while the Romans were minting silver Denarii in Rome, silver coins were not being minted in the provinces because the Romans believed that only a part of a polity so esteemed silver. It is clear that the Romans ventured extensively to mine silver. They were very proficient in the art of parting silver from the lead. The Romans extracted the ore from deep vein and employed 40 feet in diameter water wheels to stop water seeping into the deep red silver mines. Of these three system wheels some were only discovered in 2010 and yet are still in good working state. The Roman Aquifer system were also very long and very extensive. To mine Gold in Spain in 25 AD, Romans also employed similar techniques as those they used in Britain.