If it's a proof coin value is about a dollar. if you got it in change spend it.
If it was post-1964 it is worth ten cents, so long as you can get someone to recognize it as a dime. If it is pre-1965 and made out of silver, it is worth its silver content, worth up to around $1.85.
The first US dime was made in 1796 so look at the date again and post new question
Millions of these coins were made. They are worth 10 cents.
It all depends on the year, how many were made, etc.
10 cents, unless it's a proof.
The reason is because the dime used to be made of silver, while the nickel has always been a copper/nickel blend. Silver is worth more, which is why the coin could be smaller, but worth more. There used to be a silver half-dime, but the coin was so small that it was replaced by the nickel.
The P indicates it was made at the Philadelphia Mint, a D would indicate it was made at the Denver mint.It's worth about about 10 cents
US dimes were never made of gold.
If it's the size of a dime it's not American. Post a separate question and include the country it was made in, the denomination, and year.
No- it was founded in 1986.
For a 1964 dime, only a "D" mintmark is possible, so many were made that value is just for the silver, about a dollar.
A platinum dime would be worth thousands of dollars ... except that there is no such coin. All 1964 dimes were made of 90% silver and 10% copper.