ICA GemLab service
Heat Treatment Analysis
Laboratory examination for indications of heat treatment, from low-temperature modification to high-temperature treatment.
Approximately 3–7 business days. Turnaround begins on the first business day after receipt, acceptance and registration in Bangkok. Final scope and fee depend on the material, condition and analyses accepted.
Submission & shipping requirementsWhat this service provides
Clear findings. Confident decisions.
Microscopic features and relevant spectra are considered together to assess indications of heating. Conclusions depend on the material, the observable evidence and the limitations created by inclusions or a setting.
Before shipping, provide the material, approximate carat weight, loose or mounted condition and required documentation. The laboratory will confirm specimen suitability, turnaround and fee before proceeding.
- Independent gemmological examination
- Clear international English
- Secure report verification where applicable
Service questions
Before you submit.
Practical guidance for a smooth laboratory journey.
Read the full submission guideWhich service should I choose?+
Begin with the report format you require, then select any relevant origin or treatment analysis. The laboratory can review your requirements before submission if you are unsure.
Is a laboratory report a valuation?+
No. ICA GemLab reports record gemmological findings. They do not state monetary value and are not an appraisal, guarantee or certificate of ownership.
How can I verify an issued report?+
Enter the report number and PIN in the secure verification portal. Reports issued after 1 July 2025 may also be accessed using the QR code printed on the document.