Handle less, observe more
Keep a coin in its protective holder when possible. If handling is necessary, hold the edges over a soft surface and use clean, soft cotton gloves. Avoid touching the faces or talking directly over an exposed coin.
U.S. Mint: Caring for Your Coin CollectionResist the urge to polish
Cleaning, rubbing, and polishing can alter a coin’s surface and reduce its collectible value. A brighter appearance is not necessarily a better-preserved coin.
U.S. Mint: Caring for Your Coin CollectionChoose the right materials
Use suitable protective capsules or holders. Avoid PVC-containing plastics and acidic cardboard. Keep the collection cool and dry, away from abrupt changes in temperature and moisture.
U.S. Mint: Caring for Your Coin CollectionKeep the context with the coin
Retain original packaging, certificates, receipts, and your own notes. Photograph both faces before putting a coin away; a good record lets you study the collection without repeatedly handling it.
U.S. Mint: Caring for Your Coin Collection