ZEOLITNatural clinoptilolite

Natural clinoptilolite, direct from the deposit

A rock that holds what you paid for.

Water, ammonium and the nitrogen in your fertiliser all move faster through soil, sand and water than you would like. Clinoptilolite holds them where they are useful — by ion exchange, not by chemistry you have to reapply. It does not decompose and it does not wash out.

We mine, mill and ship one mineral from one deposit in South East Asia, and sell it straight to the customer. No trading house, no repackager, no one in the middle taking a margin for moving a pallet from one warehouse to another.

That is the whole reason we can quote what we quote — and the reason we can tell you the assay of the batch you are actually buying.

Why buy from us

One deposit, one owner, one assay

Every consignment comes from the same pit and ships with a batch certificate — clinoptilolite content by XRD, cation exchange capacity, moisture and heavy metals.

A vertical chain, and the price that follows

From the ground to your yard without a middleman. We would rather share the margin with the customer than with a distributor.

We publish what it does not do

Clinoptilolite is a cation exchanger. It holds ammonium. It does not hold nitrate and it does not hold phosphate, whatever a competing listing says. You will find that sentence on every page of this site.

Trials before invoices

For most applications we will part-fund a trial on your own site, with a written protocol, and publish the result whichever way it goes.

How it works, in three minutes

Gratierne · zeolite.gratierne.com · Natural clinoptilolite from mineral sources in South East Asia, direct from the deposit.

Specification

Clinoptilolite content
93–100% (XRD)
Cation exchange capacity
108–146 meq/100 g
Bulk density
650–850 kg/m³
pH
7.0–8.0
Specific surface area
40 m²/g
Pore diameter
0.43 nm
Hardness (Mohs)
2–3
Loss on ignition
6.4–15.8%
Na₂O
0.3–1.3%
Quartz
0–2%

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