Sri Lanka is a paradise for gem collectors, but navigating a foreign gem market can be intimidating. High-value purchases require basic knowledge, scientific verification, and an understanding of ethical trading standards.
Here are the key principles of purchasing gems with absolute confidence:
1. Insist on Independent Certification Never buy a gemstone solely on a seller's verbal promise. Every natural sapphire should be certified by an independent gemological testing laboratory. Look for certificates from recognized entities: - **National Gem and Jewellery Authority (NGJA)** - **Gemmological Institute of Colombo (GIC)** - **FGA or GIA accredited labs**
A true certificate will clearly state the stone's dimensions, weight, optical characteristics, natural origin, and whether it has undergone heat treatment.
2. Differentiate Treatments Over 90% of sapphires in the global market are thermally enhanced (heated) to improve clarity and color. This is a globally accepted stable treatment, but it *must be explicitly declared*. Chemical diffusion or cobalt-lead glass filling, however, dramatically lowers a stone's value. Always look for "No indication of thermal enhancement" if you are seeking a highly valuable untreated specimen.
3. Seek Direct Community Provenance When you purchase a gemstone, check if the merchant can trace the chain of custody. Supporting jewelers who source directly from licensed, cooperative-owned mines in Ratnapura ensures that a fair share of the profit stays within the community, providing safe wages and sustaining families.
Through our educational tours, Rathnadeepa introduces guests to vetted, ethical partners. We take zero commissions, letting you learn first and buy with complete peace of mind.