Examine the details closely. Look for irregularities in the design, such as misspellings or off-center mint marks.
Test the sound. Genuine coins produce a distinct sound when dropped on a hard surface due to their metal composition.
Check the weight and size. Authentic rare coins have specific dimensions and weight, so any deviation could indicate a fake.
Verify the edge. Some rare coins have unique edge designs or lettering that counterfeiters often overlook or replicate poorly.
Consult with experts. If unsure, seek the opinion of reputable numismatists or coin grading services for authentication.
Stay informed. Keep up with the latest trends in counterfeit coins and educate yourself on the characteristics of genuine rare coins.