Hobbies And Interests
Things You'll Need
Instructions
Hold the coin properly. Grasp it by the edges with the thumb and forefinger so you can roll it back and forth under a light to get a good look at the details of the coin.
Determine whether the coin is a proof. Proof coins aren't simply uncirculated coins; they go through a special die process that makes their appearance different from non-proof coins of the same design. Because the metal die that is used to press the images into the coins is polished and treated, proof coins often have a shiny, mirror-like background and a frosted look on its raised parts. This is also known as a cameo appearance. A proof coin will have much more contrast between the raised images and background, and will have a more brilliant luster or sheen than a non-proof coin.
Examine the coin without a magnifying glass. Look for visible hairline scratches, marks and other defects. Consider the luster and sheen of the coin.
Look with a magnifying glass. Examine the coin again for scratches and defects that aren't visible to the naked eye.
Compare the coin to photos of graded proofs in coin guides. Pay attention to the details and defects of the graded coins, and compare them with your coin.
Assign a grade based on the Official American Numismatic Association (ANA) Grading Standards for U.S. Coins. According to the ANA standards, proof coins can be graded from PR 60 to PR 70. PR 60 is the lowest grade given to proofs, and usually indicates a coin that has scratches or other imperfections visible to the naked eye. These coins may have lost some of their luster, appearing slightly dull. Give a PR 65 grade to a coin that has imperfections visible only under a magnifying glass; usually coins with this grade have maintained most of their shininess or luster. Award a PR 70 to a proof coin that is virtually flawless. A coin deserving of a grade this high is rare.