Looking to buy raw gold for Portugal refinery

We buy unrefined gold bars with purity not less than 97%.
The gold will be sent to a refinery facility in Portugal for testing and refining.
Payment is processed after the refinery confirms both weight and purity.
The gold remains under the seller’s ownership until payment completion.
Suppliers are kindly asked to provide the following information:
- Origin of the gold;
- Export and assay certificates;
- Price.