The precious metal you buy from us often comes directly from leading mints and accredited refineries. We carefully check the precious metal in our range for authenticity. 

You can buy gold (investment gold) easy self-testing:

1. Weigh the precious metal with a calibrated scale. The weight will have to be exactly the correct weight. Keep in mind that there may be packaging. 
2. The sound test. You can tap the product with a (different) gold coin. The bar or coin must make a (slightly) singing or high-pitched sound. The sound should not kill immediately. This test is done to determine if the inside is not made of tungsten. 
3. The specific gravity test. You can measure the dimensions of the product. Of course, the dimensions must correspond to the dimensions in the product specification. If you know the composition of the product (e.g. 100% gold), you can check the specific gravity based on the dimensions and weight. You do this by means of the following formula: p = m / v. Where 'P' stands for density, 'm' is the mass and 'v' is the volume.
4. The color test. You can compare the product color with a similar product.