Start by examining the coin's details like date, mint mark, and condition. Use a magnifying glass for close inspection. Look for wear, scratches, and any imperfections.
Check the coin's weight and dimensions. Use a precision scale and caliper to compare with known specifications. Discrepancies may indicate a counterfeit.
Consult reference materials or online resources to verify authenticity and identify any known counterfeits. Look for specific markers or characteristics unique to the coin.
Consider seeking professional authentication services from reputable grading companies. They use advanced techniques and expertise to determine a coin's authenticity and grade.
Understand the grading scale used for coins, such as the Sheldon Scale for U.S. coins. Grades range from Poor (P-1) to Perfect Uncirculated (MS-70), impacting a coin's value significantly.
Keep coins protected in holders or cases to preserve their condition and value. Proper storage and handling can prevent damage and maintain the coin's appeal over time.