Certified Diamonds in Sandton
A certificate is only worth something if it actually matches the stone in front of you. Forged and mismatched certificates are one of the most common ways buyers get caught out in the diamond trade.
Verifying the certificate, not just accepting it
GIA and IGI certificates give buyers a standardised way to compare stones, but only if the certificate genuinely belongs to the stone being sold. We check certificate numbers against issuing laboratory records and confirm the physical stone matches the documented grading before a sale proceeds.
This matters most for buyers relying on a certificate for resale value, insurance, or investment purposes, where a mismatched or forged certificate isn't just an inconvenience, it's a direct financial loss.
Why buyers and sellers work with us here
Certificate numbers checked against issuing laboratory records
Physical stone confirmed against the documented grading
Access to both GIA and IGI certified parcels
Documentation you can rely on for resale or insurance
How we support this category
Certified Diamond Sourcing
Verified GIA and IGI certified parcels sourced and cross-checked.
ViewDiamond Fraud & Scam Prevention
Certificate and grading verification built into every transaction.
ViewQuestions about certified diamonds
How do you verify a diamond certificate is genuine?
We check the certificate number against the issuing laboratory's records and confirm the physical stone matches the documented grading before the sale proceeds.
What's the difference between GIA and IGI certification?
Both are recognised grading laboratories. GIA is generally considered the stricter standard, which can affect resale value, but a genuine, matching certificate from either is a credible basis for a purchase.
Can you certify a diamond for me?
We can advise on the certification process and connect you with the right next step, though certificates are issued directly by the grading laboratory.
Get a free evaluation for your parcel
No cost, no obligation, before you negotiate with anyone.
Call +27 83 620 9606