Alexandrite · Certification
Certified Natural Alexandrite: What to Verify
An alexandrite certificate must confirm genuine natural chrysoberyl, since synthetic color-change corundum and garnet are specifically manufactured to imitate the color-change effect and can be difficult to distinguish visually. The report should also describe the strength and completeness of the color change under both daylight and incandescent light, since this single characteristic drives most of the stone's value.
Our authenticity standard for Alexandrite
Whenever a certificate is available, it's shared with you before you pay — the same commitment described in full on our site-wide Authenticity & Certification page. Because our dealer network sources through multiple independent gemological laboratories, the specific issuing lab may vary by stone; what stays constant is that the report is independent, not a seller's own letterhead.
Once you have a report number, most independent laboratories offer free online verification — compare the certificate in your hands against what the lab's own database shows before finalizing any purchase.
Ready to see it applied to a real stone? See current Alexandrite buying guidance and Alexandrite pricing.
Common Alexandrite Certification Questions
How can a lab tell natural alexandrite from a synthetic color-change imitation?
Standard gemological testing (refractive index, specific gravity, and spectral analysis) reliably distinguishes genuine chrysoberyl from synthetic color-change corundum or garnet, even when the visual color-change effect looks similar.
Have a Certificate You'd Like Explained?
Our team is happy to walk you through any alexandrite report before you buy.