GLC Treatment Disclosure Report (Ruby & Sapphire)

The Chanthaburi Gemological Laboratory (GLC) issues this report documenting the identification of a ruby or sapphire and providing an expert opinion on possible treatment.

What’s included

• Gem identification (species/variety – corundum)
• Key parameters: shape/cut, color, weight and dimensions
• Treatment indication stated in the comment field (e.g., indication of heating)
• Official GLC document issued by Chanthaburi Gemological Laboratory
  

Important: This report evaluates whether heat treatment or other enhancements may be present.
The treatment opinion is provided in the comment section of the report.

This certificate does not include origin determination.

Suitable for

• Loose rubies and sapphires
• Calibrated corundum stones

How it works

1. Add this certification to your cart together with your gemstone.
2. We submit the item to Chanthaburi Gemological Laboratory (GLC) for the gemstone report.
3. Once complete, we ship your order together with the GLC certificate.
   
   

⏳ Processing time: about 5–7 business days (may vary with lab workload).

📄 Certification fee: 500 THB (16.00 USD) — included in checkout total.

Questions or need treatment/origin analysis instead? Contact us and we’ll recommend the right GLC plan.