Old coins maintained for collections must be carefully cleaned with non-abrasive materials and a solution that does not damage the metal compounds in the coin. Improperly cleaning a coin can damage it and substantially reduce its value. Specialists knowledgeable in coin cleaning can clean coins without damaging them. Most expert coin collectors advise against cleaning coins at all, as discolorations and dirt may actually increase a coin's value, explains NemisMaster.com.Know More
To avoid damaging the coin, clean off grime and dirt by soaking the coin in a solution of mild soap and distilled water. Only soak the coin; do not rub it with an abrasive material or mix it around, as this may damage a delicate coin. Use only distilled water, not treated tap water that may contain chlorine and other chemicals that can damage the metal. After bathing them, allow the coins to air dry. Never rub the coins dry with any material, as even the softest cloths can cause damage.
A heavily encrusted or corroded coin can be cleaned by soaking it in olive oil. The coins should be soaked undisturbed, sometimes for months, to remove the dirt without damaging the coin. Ultrasound machines can also be used to clean coins.Learn more about Coins & Currency
A coin shop is one of the best places to sell coins and also get information about coins. Coin collectors also buy coins. However, anyone wishing to sell coins should not take the risk of putting an ad in the local newspaper.Full Answer >
The three most valuable foreign coins, according to ValuableWorldCoins.com, are the rare Edward III 6 shilling coin, sold for $6.8 million in 2006; the Islamic Umayyad dinar, sold for $6 million in 2011; and the Canadian Queen Elizabeth II coin, sold for $4 million in 2010. The value of a collectible coin depends on factors such as demand, scarcity and condition, which determine its sales price at any given moment.Full Answer >
The Official Red Book of coins is a commonly used price guide for coin collectors. The full name of the book is "The Official Red Book: A Guide Book of United States Coins."Full Answer >
Collectors can buy coins from coin dealers, the U.S. Mint, and auction sites such as eBay. When buying coins, knowing how to spot fakes and understanding the wholesale values of different coins will help ensure that collectors get the best value for their money.Full Answer >