An insurance appraisal is not the same as a grading report. An insurance appraisal is created specifically for insurance purposes, assigning a value for the jewelry in the event that it is lost or stolen, and the value it gives your jewelry does not hold in other circumstances. Thus, in the specific context of a piece of jewelery’s resale value, an insurance appraisal cannot be used to determine the jewelry’s resale value.A diamond grading report, for example, is a document with the specific characteristics of your diamond including cut, color, clarity, and carat weight (size). The best diamond grading reports come from professional diamond grading labs, such as the GIA and HRD. Knowing these characteristics can help determine the value of your diamond at resale. Diamonds of a higher quality, with better characteristics, will fetch a higher price at auction than those of a lower quality.