A gem identification report answers questions about a material. A jewelry appraisal gives an opinion of monetary value for a stated purpose. You may need one, both or neither for a particular purchase; start with the question you want the document to answer.
What is the gemstone?
An identification report records a laboratory’s examination of the submitted material. GIA’s colored-stone reports describe the gemstone type, whether it is natural or laboratory-grown, and any detectable treatments. They also include identifying details such as shape, measurements, color and a photograph.
Read the service name. An identification report and an identification-and-origin report have different scopes, and an origin opinion is available only for certain stones when determinable. Diamond grading is another service, describing quality characteristics under the laboratory’s system. A report’s presence does not mean every stone has received the same kind of examination.
The guide to jewelry material descriptions explains the terms you may meet in those findings.
What value is being estimated?
An appraisal describes an item and assigns a value within a specified context. GIA explains that appraisals may address replacement value for insurance or fair market value for another purpose. GIA itself does not provide appraisals.
Check the valuation date, purpose, description, assumptions and appraiser’s qualifications. An insurance replacement figure is not a promise of what someone will pay when you sell. A receipt records another number again: the price of that transaction.
| Your question | Document to discuss |
|---|---|
| What material is this, and were treatments detected? | An appropriate identification service |
| What characteristics were assigned to this diamond? | The relevant diamond grading report |
| What is this finished piece valued at for insurance? | An appraisal meeting the insurer’s requirements |
Check which item the document describes
Compare the report number, image, dimensions and description with the item offered. Use the issuing laboratory’s own verification service when available. If the document concerns one stone, ask how it relates to a bracelet containing many beads; do not assume it covers every component or provides a valuation of the whole bracelet.
LUOSHEN, for example, is listed as a bracelet of 6.4 mm turquoise discs with 18K gold-plated brass details. If documentation is offered with a piece like this, the useful question is exactly which beads or materials were examined and what the findings address. The turquoise guide explains why treatment information can matter.
Request the service that fits your purpose
For a material question, ask a gemological laboratory about the appropriate examination. For an insurance requirement, first ask the insurer what valuation document it accepts, then choose an appraiser with relevant gemological and appraisal training.
Keep the report, appraisal and receipt distinguishable in your records. Each can help answer its own question.
