Where did the word “numismatics” come from? First documented as an English word in the early part of the 1800s, this word derived from a French adjective, numismatiques, which means "of coins." In turn, that word came from the Latin word for “coin.” The meaning of the word gets even more interesting when the Latin word gets traced back to the original Greek that it was borrowed from. After some iterations, the word came from the Greek nemō, or "I dispense or divide."

Numismatic

Gold mining and refining: Precious metals basics

Photograph of gold sluicing at Dillman Town on New Zealand's West Coast in the 1880s.

Public domain image

Two techniques are usually used to recover gold from its place in nature — placer mining, used to extract gold from rivers and streams; and lode mining, used to take gold out of hard rock.

Placer mining, named after the alluvial deposits (or “placers”) of gold found in the beds of streams, was the most common and productive method of gold mining until the 1920s. The principle is to separate gold from river gravel by washing it with water. The gold, mixed with the river gravel, is washed through a series of sluice boxes, each containing crossbars at the bottom. As the water and gravel pass through the boxes, which are slanted downward to employ the force of gravity, the gold sinks to the bottom and lodges behind the crossbars.

An important derivative of this basic placer mining is dredging. A continuously working chain of buckets brings gravel up from the riverbed onto a ship, where it is broken, screened and washed through sluices.

MORE: CoinWorld.com's precious metals basics

Extracting gold from solid rock, or lode mining, uses the same processes common to all underground mining. Entry into the ground is gained by breaking the rock, by drilling and blasting. The gold ore is broken away from the surrounding rock in a transportable size and hauled out of the mine.

These processes of mining yield an impure gold, containing amounts of silver, copper and other metals. Two methods are most commonly used to extract gold from its metal relatives — a chemical process using chlorine, and the electrolytic process, first used in United States Mints.

In the chlorine process, the impure gold is heated until it becomes molten. Chlorine is bubbled through the molten gold, converting the silver to silver chloride, which can be skimmed off the top of the liquid solution. Unlike the electrolytic process, this chlorine method does not extract platinum from the impure gold.

The electrolytic process involves suspending plates of pure gold alternately with plates of impure gold in a cell containing a solution of gold chloride and hydrochloric acid. The impure gold plates are the anode, the pure gold plates are the cathode. Through the liquid, a current of electricity is passed from the anode plates to the cathode plates. The gold dissolves from the anodes and is precipitated on the cathodes. The other metals that were combined with the impure gold dissolve in the liquid, except the silver, which is converted into an insoluble chloride and falls to the bottom of the cell. The gold that precipitates on the cathode plates is washed and melted into bars. This process yields gold that is more than .999 fine, or 99.9 percent pure.

The above is an excerpt from the eighth edition of the Coin World Almanac, published by Amos Media Company in 2011.


Community Comments

Numismatics is about more than just coins.

While many people use numismatics as a general term to refer only to the study of coins, this word actually refers to the study of all kinds of money. As such, it includes the study of coins and also paper bills, tokens, and other related objects that have been used as currency by various people throughout history, as well as noncurrency items like medals. Some kinds of money used at different points in history might surprise novice numismatists; for example, a culture might have used shells as a currency. 

Barter, or the trade of objects and services for other objects and services, has long been used in the marketplace and continues today. In some cases, the line between barter and currency still provides a topic of debate, but in most cases, articles about numismatics cover subjects like coins and paper money. Numismatics might become easier to comprehend by understanding the numismatic values of coins and paper money, and this refers to the value of a coin or note that is higher than the intrinsic or face value. In other words, this could also be called the collectible value. For example, a historical gold coin has an inherent value that is based upon its bullion value. It may also have a face value, or the actual value of the money assigned by the country that produced it. However, that same coin might be worth much more than the gold or the face value because it is rare, historically significant, beautiful, and/or designed by a famous artist.

Ultimately, understanding numismatics really depends upon understanding the nature of money. In the past, money might have been shells, gems, or precious metals. Today, most societies rely upon coins and paper money, but in this digital age, even that has begun to change as billions of dollars get exchanged every day electronically without the need for physical currency. Even more revolutionary, there are new digital currencies that have never been based upon any nation's physical currency. As it has in the past, it is likely that the study of numismatics will continue to evolve as currency evolves.