Pit record
The pit, the miner group and the rough weight are signed when the stone is first found.
Ratnapura and Colombo, Sri Lanka
Gemstone provenance, recorded from the gem pit before the stone is cut.
We record each stone from the pit in Ratnapura through the lapidary and the certificate to the buyer, so an origin claim can be checked before the stone changes hands.
nimal@ratnatrace.spaceThe stone's journey, line by line
- Find
A rough stone is recorded at the pit with its weight.
- Certify
The gem authority signs the origin line.
- Cut
The lapidary records the before and after weights.
- Sell
The buyer receives the full line history.
Three facets of every record
Lapidary step
Cutting is recorded with the weight before and after, and the cutter's name.
Transfer lines
Every sale adds a line, so the stone's history can be read from the pit onward.
Before a dealer buys
- Do you grade stones?
- No. Grading is done by the gem laboratory. We record the origin and the transfers.
- Can a miner be identified?
- The miner group is named. Individual miners are not on the public line.
- Does a stone's history disappear after a sale?
- No. Every line stays. A buyer can see who held it before.