Silver coins refer to silver coins with universal collection value, represented by "Yuan Datou". It refers to silver and other property. For example, Gao Qi's Preface to Poems on the Moon in the Heaven in Ming Dynasty: "The History of the Yuan Dynasty was completed, and the Chinese book was advanced, giving a basic introduction to sixteen silver coins. Chinese name: silver coin mbth: silver coin function: collection value use: used for trading bank: People's Bank of China's word concept, basic information, citation explanation, discrimination, authenticity identification, the appreciation in recent two years is amazing. Different editions have different prices. Before investing, distinguish the authenticity, intimate tips, silver coin preservation, silver coin investment, intrinsic value, physical investment, income, use, function, five major investment silver coins, and basic information of word concepts. Headings: silver coin Pinyin: ㄣㄅㄧ? English: Gao Qi's Preface to Poems on the Moon in Heaven in the Ming Dynasty: "The History of Yuan Dynasty was completed, and the Chinese book was published. Sixteen people who compiled it were given silver coins." 2. Silver currency. Xu Ke's "Clearing Banknotes, Deceiving with Sticks, Making Books under the Owner's Name to Deceive": "If you return, it means that the owner is forced to stay in the teahouse by the Opera Troupe, and you can't take it off unless it's twenty silver coins." Zhou Libo's "Storm" Part I: "As he said, he took out a silver coin with a yuan head from his pocket and showed it to Captain Xiao and Zhao Yulin." Discrimination from the perspective of coin collection, it is not recommended to clean up the black oxide layer (also known as "patina") on the surface of silver coins. It is easy to damage the surface of coins and affect the collection value of silver coins. Silver coins with good patina are often sought after by Tibetan friends, and the price can even be several times that of the brand-new circulating version. Silver coins In addition, the method of wiping with toothbrush dipped in toothpaste can really clean the oxide layer of silver coins, but it must be soft, otherwise the silver coins will be damaged. This method is difficult to achieve just right and is not recommended. In addition, it can also be cleaned with low-concentration acidic liquid. This method also has the risk of damaging silver coins. You have to be familiar with chemical acids. Chemical reaction: the same kind of silver coin with exactly the same storage conditions, but the results will be different, some have vulcanized patina, while others do not. This has something to do with the production process of silver coins. The patina of silver coins always originates from the edge and gradually goes inward (though not all, most of them do). Including new Chinese silver coins (with or without plastic boxes) and old silver dollars (without packaging boxes), most of the oxidation starts from the circumferential edge, and less from the center of silver coins. Why? In the patina of silver coins in new China, it is often seen that one side of silver coins is obviously oxidized, and the other side is slightly oxidized or not. It may be related to the placement of silver coins and the density of the gap between coins and boxes. Chiang Kai-shek's first silver coin has a new Chinese silver coin on the front, and 999 silver is easy to sulfide and oxidize, while non-999 pure silver coins are much less (usually only faint yellow-brown oxidation or white fog of chloride); Old silver dollars, although they are not 999 silver, there are many vulcanized colors. Why is this? Some people used to say that the oxidation and chlorination of silver coins are caused by light and microorganisms. The scientific research of the mint shows that the main reason is chemical, followed by physical form restriction and coinage technology. The influence of ultraviolet rays on corrosive compounds on silver surface needs further study. If it is a spherical pure silver body, the suspension wire is suspended and placed in a sealed box to avoid factors such as air pressure, water vapor stratification and illumination. What is the oxidation result? Which parts should be oxidized first? When I was in middle school, I thought: Where are the positive and negative poles of a completely regular spherical magnet? Some Tibetan friends complained that NGC coins would be oxidized after being boxed. In fact, before being boxed, the rater observed the * * * silver coins. At that time, the * * * environment was also closely related to the unexposed state of the coins before leaving the factory, and it was not necessarily a rating box problem. Some of the surfaces of mint molds need to be oiled, and some coins are also oiled in die casting; Some stamps are made of anti-oxidation treatment after being pressed, and there is a film. Oil and chemical film, if they remain untouched, will more or less affect the surface effect of products after n years. The early large-size silver coins, which were sealed intact without a round plastic box, were directly sealed, and the chemical composition and oil film in the plastic seal would affect the coin surface, such as the 5-ounce Sun Yat-sen silver coin in 1986. On the reverse side of Chiang Kai-shek's first silver coin, whether it is an old silver dollar or a new Chinese silver coin, its discoloration is not all "bad". According to the different results of discoloration, some coins are very popular and their value is higher than that of unchanged coins, such as silver coins with beautiful sulfide color. Foreign countries also pay more attention to this kind of coin, and many collectors regard it as a rare treasure. Some early New China silver coins occasionally have small black spots, especially small silver coins that are not 999 sterling silver, which is suspected to be caused by iron impurities sticking to the coin surface during the coinage. Authenticity appraisal "Yuan Datou" is the most common kind of silver dollar collection, and it is also the one with the largest collection in the hands of citizens. In 1914, Yuan Shikai issued silver dollar currency in order to solve the military expenditure and improve his personal political status. Because the silver dollar was cast with his sideways image, it was also called "Yuan Datou". Yuan Datou was first minted by Tianjin Mint, then minted in Nanjing, Guangdong, Wuchang, Gansu and other places, and then it became the prevailing currency at that time. Due to the large amount of casting land, there are many editions. Although there are differences in editions, the standard weight of "Yuan Datou" is seven cents and two cents. Today's measurement method is 26.697 grams, and the color is 89%. There are four denominations: one yuan, middle yuan (fifty cents), two jiao and one jiao; According to the year number, there are three, eight, nine and ten-year editions of Yuan Datou. Different editions of silver coins have different prices. In the "Yuan Datou", the prices of each edition are also different. The 3-year version is the most common, followed by the 1-year version, and the market price of one yuan is around 42 yuan; The 9-year-old fine hair version is better in workmanship, and the market price is in Yuan 5 yuan; The 8-year edition is relatively few, and the market price is around 7 yuan. In another version of "Yuan Datou", the addition of the word "Gansu" is equally precious. This edition "Yuan Datou" was adopted by Gansu Mint in 1914, and the word "Gansu" was cast around Yuan Xiang, and only tens of thousands of pieces were cast, which is rare in the world. The most precious and rare is the signature version of One Yuan in 1914. On the right side of Yuan Shikai's statue, the Latin signature "L·GioRGi" by Italian sculptor "Rurgi Giorgi" is engraved, which is equivalent to "sample coins". The number may be between 1 and 1 by Tianjin Mint, but it has not been circulated, so it is difficult for ordinary collectors to witness its true face. The market price has been around 1,-1,, which is a rare treasure in modern silver coins and has attracted the attention of coin collectors at home and abroad. Distinguish the authenticity before investing. There are a lot of' Yuan Datou' fakes in the market. The pseudo "Yuan Datou" is generally not heavy enough, if it is heavy, it will be enlarged or thickened, and the color will be gray and sharp; It is also heavy enough and the size is the same as the real one. It is made of alloy and covered with silver. This method of counterfeiting is the same as many fake antiques. It is understood that the identification of silver dollar should have a deep understanding of its historical characteristics, manufacturing technology, decorative patterns, etc., and can not just look at superficial phenomena. According to Mr. Yang, his shop alone has received more than 4 "Yuan Datou" since the opening of the Confucian Temple. At the same time, more people are waiting to buy them. The ratio of citizens who sell to those who buy is about 1 to 1. Mr. Yang said, by comparison, we can find that the sharp appreciation of "Yuan Datou" is positively related to the rise of silver price. Now the world's silver reserves and stocks are decreasing year by year, and the price of silver coins is likely to continue to rise. Of course, the current price is not low, and citizens should be cautious before entering the market. The chemical identification method of silver coins intimately prompts the authenticity of silver coins. The silver coins are wiped several times on a touchstone until silvery scratches appear, and then nitric acid is dripped on the scratches. At this time, if it is real money, the mixed liquid on the scratch is khaki, while the counterfeit money is colorless and transparent. If the silver content of silver coins is insufficient, the mixed liquid of nitric acid also presents different excessive colors of khaki, but it is not rich enough. The less silver content, the lower its richness. The precipitate crystal of pure silver nitrate is white and transparent. Because silver coins contain impure silver and are accompanied by a small amount of other non-ferrous metals, the nitrate compound precipitate of silver coins is khaki. The chemical precipitates of tin nitrate and lead nitrate are gray white material. Try not to touch the surface of silver coins directly with your hands, because sweat stains on your hands will pollute the surface of silver coins. It is best to seal the silver coins with sealed plastic, which is more convenient to watch and prevent dust in the air from polluting the surface of silver coins. Try not to collide, because it is easy to leave traces when colliding with each other. If the silver coin is dirty, it should be slightly cleaned in warm soapy water, then washed with clear water and gently dried with a soft cloth, and finally placed in a dry and ventilated place; Try not to rinse with light alkaline water or brush with a brush. Alkaline will easily cause corrosion to the surface of silver coins. Color-changing silicone rubber should be placed in the place where silver coins are stored, which mainly plays the role of absorbing moisture; When it is dry, silicone is blue, and it will turn red when it absorbs moisture. It's better to put it in a safe with anti-corrosion and moisture-proof. The intrinsic value of silver coin investment for thousands of years, despite the constant change of dynasties, silver, as a currency and a means of exchange, has kept its own value and function. Silver has always maintained its intrinsic value, as not fade away said. On the contrary, silver has been appreciating for 1 years and 1 years. The purchasing power of 1 ounce of silver today is similar to that of 1 years ago, and there is not much risk. Investing in silver coins and bars in kind is a good choice, because you can hold them in your hand. Unlike stocks, they are controlled by the board of directors. You can decide how to use silver. They are also different from futures and other complicated silver derivatives. You can be sure that the silver you own is actual silver, not paper documents printed by banks. The yield of silver is more volatile, which is higher than that of gold and other precious metals, which is due to the scarcity of silver. The trading volume of silver in the world is very small, and any small purchase may have a great impact on the silver market. According to historical data, the price of silver is rising very fast, and it may rise by 1% to 2% in a few weeks. Uses You can't use stocks to produce antibacterial drugs, you can't use bank balance to make movies, and you can't use other metals as conductive lines. Silver, on the other hand, is a sharp contrast. It has thousands of industrial uses, which limits the amount of circulation and makes the silver in your hand appreciate. When you buy televisions, computers and other electronic products, you have silver. Silver still exists in your battery, car bearings and medical equipment that you are most unlikely to buy. In addition, the solar energy industry and water purification industry also have the shadow of silver. With the continuous development of the world and technology, the demand for silver will only increase. Functional gold and silver regain their monetary functions and find a foothold in global circulation. * * * and their central banks are seeking new investments to support their speculative investments and increase the value of foreign exchange. China and India have successively purchased large quantities of gold, diversifying their foreign exchange reserves. Among them, India purchased 2 tons at one time in 29, the largest purchase in history. People all over the world are beginning to realize that the value of metal is not only used for investment, but also an actual tangible asset. With more and more people investing in silver, the price is bound to rise, thus benefiting silver coin investors. The five major investment silver coins are internationally recognized as: China Panda Silver Coin (999 sterling silver), American Eagle Silver Coin (999 sterling silver), Canadian Maple Leaf Silver Coin (9999 sterling silver), Austrian Music Silver Coin (999 sterling silver) and Australian Koala Silver Coin (999 sterling silver).