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For most numismatists, their coin collection is a source of pride and joy. Even if you’re not a hobbyist, investing in rare coins can be an exciting (and lucrative) venture. Yet, surprisingly, many people don’t know how to store coins properly, despite the significant risks that improper storage and handling pose to their investment.
General Guidelines for Proper Coin Storage
If you learn how to store your coins before you purchase them properly, you have a much better chance of preserving their value and physical condition. Remember these tips to protect your coin collection from future damage:

Take detailed notes for every piece in your collection, even the low-value coins. Record keeping makes it easier to keep track of coins and compare market trends. It’s also essential for insurance purposes.
Use coin-storage devices to categorize, protect, and store your coin collections. The simplest devices consist of coin albums, folders, and rigid plastic holders.
Consider location before you begin coin collecting. Look for a cool, dry, and dark place that doesn’t experience high humidity or frequent temperature changes.
Improve security by investing in a safe where you can keep your high-value coins, precious metals, and other valuables.
Prevent rust and oxidation by placing a silica gel pack near your coins to absorb excess moisture that can accelerate tarnishing.
Wear cloth gloves when handling coins; never touch the coin’s face directly. Instead, pick the coin up gently on the edges to preserve its condition.

What Factors Can Damage or Tarnish Valuable Coins and Lower Their Value?
Coin damage can occur from various environmental factors, such as time, humidity, and temperature changes. However, poor handling and certain chemicals can also cause significant damage, as will a poorly chosen coin-storage environment....