However, be aware that some hallmarks can be faked. This is why it’s important to use a mark as only one of many indicators of authenticity. The hallmark may be very small. You might even need a magnifying glass in order to see it clearly.
Be careful with this method as you run the risk of damaging your jewelry. You also have to use the right type of stone or the marks will be meaningless. You can get a jeweler’s stone through a jewelry supply store online or by talking with your local jeweler.
Use the instructions that come with your tester to determine the exact results. Gold is a conductive metal, so a pure gold piece will have higher readings than a plated one.
These kits can be quite affordable, if ordered online. They start at around $30.
