It always has its face value. To be a collectible, most have to be in very good condition.
CorrectionAnything you can do at home to clean a coin will almost always reduce or destroy its collector value. If the coin has a lot of dirt and crud on it, you can use a soft cloth and distilled water, but any chemicals or abrasives will damage the surface.Also note that the term "very good" describes a specific category of wear on a coin, with other categories being good, fine, very fine, and so on. Some coins are collectible in merely good condition (very worn) while others only become collectible if they're uncirculated or nearly uncirculated.
The short answer is, "DO NOT CLEAN YOUR COINS". If you have a coin with any collector value to it or, you are hoping to increase the value of a coin by cleaning it, any cleaning process will damage the finish of the coin by introducing tiny scratches or removing small quantities of metal. Any cleaning process will possibly render the coin worthless at worst. If you have a coin of no collector value and you would just like to make it look nice and shiny, you could use any of the commercially available jewellery cleaners.
DEFINITELY NOT! Cleaning your coins will make them look un-natural, and will make them worthless in the eyes of collectors. And using anything abrasive (like polishes) will also leave tiny hairline scratches on the surfaces of the coin -- making them even more worthless. If you do this, you will likely turn your valuable rare coins into worthless slugs.
Normally, any alteration to a coin, especially a hole, would render it worthless as a collectible. However, the 1860 British Farthing is a valuable coin, even in "fine" condition. Take your coin, and the hole, along to a reputable coin dealer for inspection and a valuation.
A worthless coin refers to a coin that has no monetary value due to factors such as being out of circulation, being made from a non-precious metal, or being counterfeit. These coins are typically unable to be exchanged for goods or services.
sou? Its french
It was worthless.
That coupon was worthless because it had expired already.
To clean a coin, you can use a mild dish soap and water to gently scrub it with a soft-bristled toothbrush. Avoid harsh chemicals and abrasive materials, as they can damage the coin's surface and reduce its value. If in doubt, it's best to consult a professional coin dealer or conservator for advice on the best cleaning methods for your specific coin.
It's worth a whole cent. The fingerprint isn't stamped in but was etched when someone handled it with dirty fingers. Over time, the oils from your skin will react with the metal in the coin, actually eating into the surface of the coin, which may make it look like the fingerprint was stamped into the coin. This is considered damage to the coin and can easily make the coin worthless to collectors.
Cleaning a coin, generally reduces the value. Better to leave as is in most cases.
A hole in any coin that was not minted with a hole would make it worthless. Modified coins have no collector value other than whatever the scrap value of the metal might be.
The value of the oldest coin is unknown, but a coin's age does not by itself establish its value. It might very well be that the coin is worthless, due to deterioration. I do not know the answer to this, and I doubt anyone does.