In order to give an accurate estimate, the coin should be seen. I suggest you take it to a coin dealer and have it appraised.
Please rephrase question.
The coin is 75% copper and 25% nickel, so the coin is likely face value the date is still in circulation.
2 mil
If you have a US nickel, it is either coated with copper or has changed color due to exposure to some chemical and has no special value. If it is a 1942 Canadian nickel, it varies from $.40 to $1.75 in circulated conditions, $3 and up in uncirculated grades. The material is called "tombac" and is an alloy of copper and zinc.
Sterling silver is 92.5% silver with 7.5% copper and no nickel.
Modified coins have no collector value. Any value would be associated with the ring as a piece of jewellery. The 1948 British Florin is made from a copper-nickel alloy and, in perfect condition (not as part of a ring), it might get up to £8 GBP.
This is not a Mint error, it's a novelty coin that has no collectible value.
A 1965 nickel is not made of silver; it is composed of 75% copper and 25% nickel. Its value is generally only face value unless it is in exceptional condition or part of a special set.
It is made of copper and nickel. A 1949 NICKEL is made from copper & nickel.
Six cents to $1, depending on mintmark and condition.
No matter what denomination it is, if found in circulation it's face value.
Copper-nickel. If circulated, it has no particular special value.