We strive to offer the most accurate and authentic descriptions of the materials of each piece of jewelry. We use our years of knowledge in the industry along with the expertise of two very cool machines. One is like a portable x-ray machine that tells us what the metal is precise. The other is a presidium gem tester, which confirms the type of gemstone in rings and other beauties. Finally, we spend time with each item, researching the construction, the hallmarks, the style. And, if there is something we don't know, we consult with expert jewelers. The best part is that we offer an authenticity guarantee, so if there is something that you were not expecting or for any reason, you have 30 days to make a return for a full refund.