Always hold coins by the edges and wear cotton gloves to avoid oils and dirt from your fingers damaging the surfaces.
Cleaning can scratch or strip a coin’s natural patina, drastically reducing its value. Expert collectors and appraisers recommend leaving them as-is.
Use acid-free holders like Mylar flips, coin capsules, or archival-quality albums. Avoid PVC plastic—it can release chemicals that damage coins over time.
Store coins in a cool, dry, and dark place. Excess humidity can lead to corrosion, and temperature fluctuations can cause condensation.
Maintain detailed records including date, origin, metal composition, and any historical significance. This enhances both value and enjoyment of your collection.
Check your coins periodically for signs of tarnish, pests, or moisture. Early detection can prevent irreversible damage.
When in doubt, seek guidance from a certified numismatist or appraiser. They can provide expert evaluations, conservation advice, and authentication.