In short. Write the specification first: application, particle-size range and test method, element limits with the analytical method, moisture, volume, port and packing. Then test samples in more than one laboratory, fix the commercial terms and inspection, plan the container shipping, and track each batch’s Certificate of Analysis over time.
Buying bulk quartz from another country goes well when both sides agree early on what is being bought, how it will be checked and how it will travel. This is the order we recommend.
1. Write the specification
- The application, and the process the quartz goes into.
- The particle-size range, with the sieve series or laser method you test by.
- A chemical limit for each element that matters to you, with the analytical method.
- A moisture limit.
- Monthly volume, destination port and packing.
A specification written this way lets a supplier say plainly whether they can hold it.
2. Have samples tested in more than one laboratory
Ask for samples with the supplier’s analysis, and test them in your own laboratory or an independent one. Agree how samples are taken and split, so both laboratories test the same material. Where results differ, a referee laboratory named in advance saves an argument later.
3. Fix the commercial terms
Agree the Incoterms rule, payment terms and who pays for inspection. Many buyers appoint an independent inspection company to sample and check the material at loading. Put the specification and the tolerance for each parameter in the contract, along with what happens when a shipment falls outside it.
4. Plan the shipping
Bulk quartz usually travels in bulk bags inside 20-foot containers, typically 20 to 25 metric tons per container, depending on packing and on weight limits along the route. Confirm the bag type, labelling, loading method, and whether wooden pallets must meet ISPM 15 treatment rules at the destination.
5. Hold consistency over time
The first shipment proves little on its own. Ask for a Certificate of Analysis for each batch, compare it with your incoming checks, and track the results over time. Ask whether the supplier keeps a retained sample from each batch, so any dispute can be settled against the same material.
How we work
We supply quartz grits and powder in container loads, with a batch Certificate of Analysis. Send your specification and we will tell you what we can supply consistently.
Revised September 2026 to separate industry background from what quartz.lk supplies.
