We determine the purity of each piece of gold by going through a 3-Step process. We will test whether or not each piece is magnetic, has a proper hallmark stamp, and finally we will file into each piece and test with a solution. After performing these 3 steps, we will be able to determine whether or not your piece is real and the karatage of each piece. Remember, just because your gold looks real and has a stamp, it doesn’t necessarily mean it’s authentic. If you have any questions and would like us to determine the authenticity of your items, simply bring them into one of our stores and one of our qualified professional precious metals specialists will assess them. We offer FREE appraisals and there’s no obligation to sell. Please note that your items will be slightly damaged in the testing process.