We have a Mexican 7-sided coin (10 pesos)dated 1861 (?)or 1981, worn & heavy.How can we tell if it is silver?
447084
"he United States minted coins for the Philippines from 1903-1945. These coins came in 1/2 centavo (minted only 1903-1908 with 17.7 million coins; yet unpopular with public and so were discontinued), 1 centavo, 5 centavo, 10 centavo, 20 centavo, 50 centavo, and 1 peso varieties. The 1/2 and 1 centavo coins were bronze, the 5 centavo nickel, the 10, 20, 50 centavo and peso coins were silver. From 1903-1906, the silver coins had a high content (90% silver, also known as coin silver). The composition was reduced in 1907, due to a jump in silver prices."\n\nThat won't help if you're just wanting to know if that one that YOU have is silver. Sorry. You could take it to a pawn shop... maybe a bank.
622151
Call or take it into a coin broker or rare coin shop.  You should look at a few books before you actually show it to them, as they will always offer you less than it is actually worth!  Never sell it on the same day that you inquire about it & don't give up any of your personal info to them.  Gather as much info as you can, then make a decision as to whether or not you will sell it.  Sometimes, if you can afford it, it is better to adopt a "wait & see" attitude if your bill is a silver certificate, because some are so extremely rare.  The U.S. Treasury Department may be able to advise you.
1181964
Have it appraised first and foremost.  Take it to a local coin dealer (yellow pages or on-line search) and ask their opinion.  Then I agree, sell on EBay but you will know your reserve.
375483
Go on ebay and type the year and denomination of the bill\n\nthat will give you some kind of an idea.
753195
Has it got a blue tint?  If it does, and it was printed before 1935, on or abouts it could be a silver certificate.\n\nThat meant it has value in sterling silver.  Sorry I do not know more than that.\n\nContact the mint.  The website comes on T.V. all the time.\n\nIt would be interesting to find out\n\nNow, make sure that it is the U.S. mint.  Not somebody calling themselves a mint, you find that alot.
858362
if you own a penny dated 2009 it could be a forgery-- then again it could be a defective die being used during the press cycle of both the obverse and reverse strike to the coin-- mint errors are in good demand and you should have it authenticated thru p.c.g.s. or a grading service to see if it is in deed an error--if it is authentic and a mint error it could be worth quite alot of money.i heard a few years back where a susan b anthony was found on a quarter planchet-- it was sold for several thousand dollars on an auction website-- the mint does make errors and cannot retrieve some coins sent into circulation because the person watching missed it-- you indeed have a coin thats interesting for sure-- if its real-- you may have a penny that will buy you a new car or something else-- go to a reliable coin dealer and have it checked out-- or have it authenticated thru the previous mentioned services-- good luck
324047
Look for any of these marks:\n\nSilver- Ster, Sterling, 800, 900, 925\n\nGold- 585, 9K, 10K, 12K, 14K, ect.\n\nIf they are unmarked:\n\nDo not acid test, especially silver! Take them to a Jeweler. Most of the time, they will tell you for free.
40978
A really badly beat up coin might be worth not much more than the price of the silver.\nAlthough a silver 1775 Carolus III 2 Reales coin will usually sell for $25 to $45, a coin of exceptional quality can go for as much as $250.  If you really want to know what it is worth, take it to a reliable dealer.
315749
I got some counterfeit money as change when I was in France. I didn't know the difference between a counterfeit 10 franc piece (coin) and a genuine 10 franc piece. I tried to spend it in a shop and the clerk wouldn't take it and said it was fake. I basically said WTF, I got it as change somewhere.  But they still wouldn't take it. I showed it to a local and they pointed out the little imperfections in it.  But it DID look and feel pretty similar, almost exact even to a genuine 10 franc piece, it wasn't an obvious fake like photocopies of dollar bills are.  And 10 francs was about $2 so who expects THAT to be fake??
109340
These websites should help\n\nhttp://coins.heritagegalleries.com/info/typevalues.php \n\nhttp://en.wikipedia.org/wiki/Kennedy_Half_Dollar\n\nhttp://coincollector.org/vault/coin.html?cat=5&id=74\n\nwww.pcgs.com/prices/frame.chtml?type=date&filename=kennedy_half_mod\n\nThis website will tell you the mintage of the coin\nwww.coinfacts.com/half_dollars/kennedy_half_dollars/kennedy_half_dollars.html
1091798
The Hebrews probably first used coins in the Persian period (500-350 B.C.). However, minting began around 700 B.C. in other nations. Prior to this precious metals were weighed, not counted as money.\n\nSome units appear as both measures of money and measures of weights. This comes from naming the coins after their weight. For example, the shekel was a weight long before it became a coin.\n\nIt is helpful to relate biblical monies to current values. But we cannot make exact equivalents. The fluctuating value of money's purchasing power is difficult to determine in our own day. It is even harder to evaluate currencies used two- to three thousand years ago.  Have a look at the chart on the website pasted below.
703550
Well, I do not know all of the world, but two American quarters are currently worth over $100,000 each in the highest grade. They are the Barber 1901 S and the Standing Liberty 1916. Also, the overdate 1918 is also that high as well. Those are the most expensive silver coins from the 20th century I know of. If it can be nickel, the 1913 Liberty head is worth over 1 million, and the 1933 Gold Double Eagle sold for about 8 million I believe.
263283
As of 3/1/06, 10 pesos are worth 0.95611\n\nSee the link below:\n1.  Choose the base currency of Mexican Dollars\n2.  Target Currency of US Dollars.\n3.  Choose your date range.\n4.  Press Retrieve Data\n\nMultiply the answer times ten as it for a single unit.
199073
This appears to be a minting error and the coin is probably worth a few dollars. Take it to a coin collector and have it appraised.
12948
Coins at one time weighed the amount of metal that they contained's value.IE; Gold coins were worth thier weight in Gold, Silver coins (Dimes, Quarters, Half Dollars and Dollars) were worth thier weight in silver, Pennies were copper, 5 Cent coins were Nickel
308436
Depends on where it was minted and does it have any unusual things about it. It could be anywhere from just over $10 up into the thousands. Best thing is to get the red book of coins. That will tell you exactly what to look for and how much your coin is worth. Be careful taking it to a dealer of coins, they will lie to you every time, hoping you are willing to sell it and they can make big money off it (if it is one that is worth a lot of money). The library would have books about the value of coins. By the way. There were two kinds of sliver dollars in 1921, the morgan and the peace. Those are how they are known in the collector world. Also in the books about value of coins.
589542
Your best bet is to find a coin dealer in your area.  You can check out approximate values by looking at what the coin and silver certifates are selling for on ebay, or at one of the online price guides.  Good luck!