How to Test Coin for Solid Gold or Gold Plated
When it comes to determining whether a coin is made of solid gold or simply gold plated, it’s important to be thorough in your testing. Gold coins can be valuable, and knowing the true composition can significantly impact their worth. Here’s a detailed guide on how to test a coin for solid gold or gold plated.
Using a Magnet
One of the simplest ways to test for gold plating is to use a magnet. Gold is non-magnetic, so if the coin is attracted to the magnet, it’s likely not solid gold. However, this method is not foolproof, as some gold-plated coins may also be non-magnetic due to the base metal used.
| Method | Result |
|---|---|
| Magnet Test | Attracted to magnet = likely not solid gold |
Using a Magnet and a Magnetizer
For a more accurate test, you can use a magnet and a magnetizer. Gold-plated coins can be magnetized, but solid gold coins cannot. If the coin is attracted to the magnet, but not to the magnetizer, it’s likely gold plated. If it’s attracted to both, it’s likely solid gold.
| Method | Result |
|---|---|
| Magnet and Magnetizer Test | Attracted to magnet, not magnetizer = likely gold plated |
Using a Gold Testing Kit
A gold testing kit is a more reliable method for testing the purity of a gold coin. These kits typically include a testing stone, a gold testing acid, and a magnifying glass. To use the kit, you’ll need to scratch the coin with the testing stone, apply the acid, and observe the color change. The color change will indicate the purity of the gold.
| Color Change | Purity |
|---|---|
| Reddish Brown | 10K Gold |
| Orange | 14K Gold |
| Green | 18K Gold |
| Blue | 22K Gold |
| Black | 24K Gold |
Using a Scale
Another way to test for solid gold is to use a scale. Gold is a dense metal, so a coin made of solid gold will weigh more than a coin of the same size made of gold plated. You can compare the weight of your coin to the weight of a known solid gold coin of the same size to determine if it’s solid gold.
Using a Microscope
A microscope can help you examine the coin’s surface for any signs of plating. Look for any inconsistencies in the gold color or any visible base metal underneath the gold. If you see any signs of plating, it’s likely not solid gold.
Using a Professional Appraiser
For the most accurate results, it’s best to consult a professional appraiser. They have the expertise and tools to determine the true composition of a gold coin. While this may be more expensive, it’s the most reliable method for testing the purity of a gold coin.
By using these methods, you can determine whether your coin is made of solid gold or simply gold plated. Remember, the value of a gold coin is greatly influenced by its composition, so it’s important to be thorough in your testing.