BUYER'S GUIDE
Tanzanite certificates: reading and checking a report
The word ‘certificate’ can describe different documents. The issuer, scope of examination and link to the individual stone matter most. Check the report's source first and then the tanzanite details; a valid number online alone does not establish that the stone in front of you is the same one.
Identify the issuer
Request the complete readable document, issuer's name, report number and date. Distinguish an independent laboratory report from a seller's statement. Both may contain useful information, but they are not produced through the same process and do not automatically have the same scope of examination.
GIA describes its documents as reports rather than certification or monetary appraisals. GIA links in AURELIS guides are educational sources. They do not establish a GIA partnership or imply that every supplied tanzanite has a report from that laboratory. Request the issuer for your particular offer in writing.
Verify the number with the issuer
If the laboratory provides online verification, open its official website independently and enter the report number. GIA provides Report Check for its reports. Do not rely only on a seller-supplied QR code or link; first establish the domain and issuer's identity.
Compare the retrieved result with the document, particularly material identification, weight, dimensions, shape, colour description and treatment comments. If no result appears or details differ, ask the issuer directly. Paper appearance alone is not proof of authenticity.
Identification is different from valuation
GIA states that a coloured stone identification report describes the material and detectable treatments. It separately explains that it does not provide a monetary appraisal. Do not infer market price, future saleability or a particular gain from the report. Pricing requires a current offer and, where needed, an appraisal with a stated purpose.
Connect the report to the offered stone
Ask how the seller connects the delivered piece with its documentation and request photographs of that actual stone. Online verification does not physically examine it. Where uncertainty remains, arrange professional assessment of the stone itself. Before an AURELIS order, confirm the issuer, supplied document, total price and delivery date.
| Step | What to establish |
|---|---|
| 1. Issuer | Who examined the stone, and within which scope |
| 2. Number | Match with the official database, if available |
| 3. Details | Weight, dimensions, material and treatments |
| 4. Actual stone | Connection between the document and delivered stone |
Before sending an enquiry
- Do I have the full document and know its issuer?
- Have I checked available details directly with the issuer?
- Do I understand what the report covers and what it does not assess?
Sources and further reading
- GIA · Report Check
- GIA · Colored Stone Reports and Services
- GIA · Reports, certification and appraisal
This guide helps compare products and order terms. It does not promise future returns or buyback.