1. The “Origin & DNA” Questions
Origin significantly impacts the “Origin Premium” of a stone. You must verify that the stone is geologically Sri Lankan.
- “Does the lab report explicitly state ‘Sri Lanka’ as the geographic origin?” (Note: GIA and GRS often make this optional; ensure your specific report includes it.)
- “What are the primary inclusions used to determine origin?” (Ask the dealer to show you the “silk” or “fingerprints” under a loupe that are characteristic of Ceylon corundum.)
- “Is there any evidence of ‘Color Zoning’?” (While a drawback in diamonds, slight zoning in sapphires can actually be a fingerprint of natural Ceylon origin.)
2. The “Treatment & Transparency” Questions
In 2025, an “Unheated” stone can be worth 100% more than a heated stone of identical appearance.
- “Are there any indications of ‘Thermal Enhancement’ or ‘Heat’?” (Even “minor” heat affects the investment grade.)
- “Has the stone been ‘Diffusion Treated’ or ‘Clarity Enhanced’?” (Treatments like Beryllium diffusion or lead-glass filling are unacceptable for high-value assets.)
- “If the stone is a Star Sapphire, is the star 100% natural?” (Ask if the star was “diffused” onto the surface, which is a common deceptive practice.)
3. The “Institutional Trust” Questions
A certificate is only as good as the lab that issued it.
- “Can I verify this report number on the lab’s live 2025 database?” (Always check the GIA, GRS, or NGJA website directly; do not rely on the physical paper alone.)
- “Is the dealer a registered ‘Active License Holder’ with the NGJA?” (Ask for their current 2025 license number to ensure they are legally permitted to export.)
- “Will you provide a ‘Double Certification’ for stones over 5 carats?” (For high-value stones, it is standard practice to have both a local Sri Lankan report and an international GIA/GRS report.)
4. The “Logistics & Legal” Questions
- “Is the price ‘CFR’ (Cost and Freight) or ‘FOB’ (Free on Board)?” (Clarify who pays for the Malca-Amit or FedEx insurance during transit.)
- “What is your ‘Inspection & Return’ policy once the stone arrives?” (A reputable 2025 dealer should offer a 7-14 day window for you to have the stone audited by your own local gemologist.)
- “Are all local Sri Lankan export taxes included in the quote?” (Ensure there are no hidden “processing fees” at the Colombo airport.)
The “Red Flag” Summary
Walk away if:
- The dealer refuses a live virtual viewing under natural light.
- The lab report is more than 3 years old (treatments could have been added later).
- The “Unheated” price is too close to the “Heated” market average.