Strategic Minerals
Coltan (Columbite-Tantalite) — Sourcing and Due Diligence
Coltan is the common name for columbite-tantalite, the principal commercial source of tantalum and a significant source of niobium. It is also one of the most closely scrutinised minerals in international supply chains.
Overview
Coltan at a glance
Downstream buyers of tantalum are generally required to evidence responsible sourcing to regulators, auditors and customers. That expectation sits at the front of any coltan discussion, not at the end.
Afrimet Global Resources handles coltan enquiries under regional traceability expectations, with origin evidence, chain-of-custody records and counterparty verification established before commercial terms are considered.
Grade is expressed as combined tantalum and niobium pentoxide content and is established by independent assay for each consignment.
Key parameters
- Typical form
- Concentrate
- Grade basis
- Combined Ta2O5 / Nb2O5 by independent assay
- Origin
- Democratic Republic of Congo and Central African channels
- Due diligence
- Enhanced — regional traceability expectations apply
- Documentation
- Origin, chain-of-custody and export records
- Availability
- Confirmed per transaction, subject to partner and contract
In practice
How coltan material is handled
Material is described against a written specification, sampled and assayed by an independent party, and weighed at the point named in the contract. Origin, export and inspection documentation is prepared to the requirements of the country of export.
Nothing on this page represents available stock, guaranteed quantity or a firm offer. Availability, grade and commercial terms are confirmed per transaction and remain subject to verification, documentation, contract and applicable law.
Product forms
Forms of Coltan discussed
Coltan concentrate
Concentrate valued on combined Ta2O5 and Nb2O5 content established by independent assay, with deleterious elements assessed separately.
Applications
Where it is used
- Tantalum capacitors for electronics
- Superalloys for aerospace and energy
- Chemical and medical applications
- Niobium for high-strength steel
Buyer requirements
What we ask for before terms
- Company registration documents, beneficial-ownership details and authorised representative
- KYC/AML and sanctions screening completed before commercial terms are discussed
- Written specification: form, grade or assay basis, quantity, tolerance and packaging
- Destination country, port, refinery or facility and preferred Incoterm
- Evidence of financial capacity appropriate to the size of the enquiry
- Traceability and responsible-sourcing evidence appropriate to the buyer's downstream obligations
Questions
Frequently asked questions
How is coltan grade determined?
By independent assay of the specific consignment, expressed as combined tantalum and niobium pentoxide content.
What traceability documents are provided?
Origin and chain-of-custody records assembled for that consignment. We do not claim membership of, or certification under, any scheme unless it is documented.
Can small parcels be handled?
Parcel size is discussed per enquiry. Compliance and documentation requirements apply regardless of size.
Explore
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Responsible mining
How origin, due diligence and community obligations are handled.
Investment opportunities
Participation models for investors and project partners.
Contact us
Send a requirement to the commercial team.
Discuss your coltan requirement
Availability, specification and commercial terms are confirmed per transaction and subject to verification, documentation, contract and applicable law.