If I understand the question, the term "Mint state" refers to the uncirculated grade of a coin, not one of the United States
Mint state means a coin in the same condition as it was when released by the mint that struck it.
A mint condition coin is a coin that is in pristine condition, as if it has just been produced at the mint. It will have no signs of wear, scratches, or damage, and the details on the coin will be sharp and well-defined. Mint condition coins are highly valued by collectors due to their rarity and quality.
Mint condition, Mint State, & Uncirculated all mean the same thing. Unused, no wear, as in the same condition as from the Mint when the coin was struck.
The little "D" on the coin means it came from the Denver Mint. The Denver Mint is in Colorado.
It depends on the type of coin the date and denomination on were the mint mark is located
This is a very common coin even in mint state. If you got in change spend it. If it's a high grade mint state coin retail value is $1.00-$1.25
Unless it's a high grade Mint state coin the value is about $4.50 for the silver in it, If it is a mint state coin value is $5.00-$7.00
The mint mark is located on the reverse [tails] side of the coin at the bottom below the wreath. If there is no mint mark then the coin was minted at the Philadelphia Mint.
The earliest the coin was produced by the US mint, the more rare it probably is. However, the mint state would also contribute to the coin's value.
Mint State - Same as Uncirculated. A coin free of any trace of wear. Proofs - Coins struck for collectors using specially polished dies.
mint mark is to the left of the value on the reverse.
A typical Mint State coin is about $50.00