X-Ray fluorescence technology uses x-rays to measure the exact content and purity of metal items. This process is totally nondestructive, extremely accurate, and instantaneous. We make our offers based on the exact purity of your items. For example, 14K gold items range from 53% to 58.5% gold, so two items of the same exact weight that are marked 14K gold may fetch a different price depending on their exact purity. Thanks to X-Ray fluorescence technology, we can discover the precise composition of your items for the most fair and accurate pay-out. Very few jewelers, gold buyers, and pawn shops possess X-Ray fluorescence technology.