How to store coins properly
A coin's condition directly affects its price — a scratch or tarnish can halve the value of a rarity. Proper storage costs pennies and saves a fortune. Here's what to know.
Golden rule: don't touch the surface
Oils and sweat from your skin leave fingerprints that etch into the metal over time. Hold a coin only by its edge, with two fingers, over a soft surface so a drop won't damage it.
What to store them in
- Capsules — clear plastic discs sized to a specific diameter. The best protection for valuable coins.
- 2×2 holders — cardboard or self-adhesive frames with a window. Cheap and handy for circulation coins.
- Trays/albums with slots — for series; easy to browse a whole collection.
- Slabs — a professional capsule with a grade (NGC/PCGS): maximum protection plus a certified condition.
Storage conditions
- 1Keep it dry: moisture is the main enemy. Stay below 50% humidity and add silica gel to the box.
- 2Stable temperature, away from radiators and windows (swings cause condensation).
- 3No direct light — it speeds up silver tarnish.
- 4Away from PVC, rubber and newsprint — they emit aggressive fumes.
Silver tarnishes — that's normal
Silver coins acquire a patina (toning) over time — a natural process and often a plus: even toning protects the metal and appeals to collectors. Don't try to "restore the shine" — you'll only ruin the coin.
Frequently asked questions
Can I handle a coin with bare hands?+
Only by the edge. Avoid touching the obverse and reverse — fingerprints damage the metal. For valuable coins use cotton gloves.
Should I clean old coins?+
No. Cleaning almost always lowers a collectible coin's value. The original surface and patina are worth more than artificial shine.
What is PVC disease?+
A green sticky film from PVC plastic that gradually corrodes the coin's surface. Use only PVC-free capsules and holders.
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