Tungsten and tantalum concentrates.

Claus Minerals is a trading company based in Tallinn, Estonia. We supply converters, processors and refiners with assayed, documented material.

Claus Minerals OÜ · Registry code 17629340
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Tallinn old town and harbour at dusk
Tallinn

What we supply

Two concentrates, supplied to an agreed specification and settled on independent final assay.

Close-up of dark metallic ore

Tungsten concentrate

65% WO₃

For APT, ferrotungsten and tungsten carbide production. Trial lots from 10 t, then full containers.

Specification
Close-up of iridescent mineral ore

Tantalum concentrate

Ta₂O₅

For tantalum chemicals, powder and capacitor-grade metal. Assay and radioactivity declared on every lot.

Specification
Container terminal with cranes at night
How we work

From the mine gate to your port

We contract with the producer and with the buyer, and run the shipment in between: inspection at loading, export clearance, freight, insurance and documents.

You deal with one counterparty and receive one complete document file per lot.

How we work
Inspection

Independent assay at loading

SGS or Bureau Veritas weigh, sample and assay before the material leaves origin.

Traceability

Chain of custody per lot

Origin and custody records that support your due diligence under EU and US rules.

Settlement

LC or cash against documents

Priced on contained metal. Final settlement on the agreed assay.

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