Greenbox Group SG

Mon - Fri 10:00-18:00
Rare Earth & Strategic Minerals

Strategic Coltan

Premium Columbite-Tantalite sourcing for the global electronics and aerospace industries. Our supply chain focuses on high-yield Tantalum (Ta2O5) and Niobium (Nb2O5) concentrates, essential for high-performance capacitors and specialized alloys.

Electronics Grade
Conflict-Free Verified
Coltan Mineral Concentrate
Primary Target

Tantalum Pentoxide

ComponentTypical Concentration
Tantalum Pentoxide (Ta2O5)25% - 35% Basis
Niobium Pentoxide (Nb2O5)15% - 25% Typical
Iron Oxide (Fe2O3)10% - 12% Maximum
Titanium Dioxide (TiO2)3% - 5% Maximum
Moisture Content0.5% Maximum

Quality Assurance: All Coltan shipments undergo mandatory chemical assay analysis and radioactivity testing. We ensure strict compliance with OECD Due Diligence Guidance to guarantee 100% conflict-free sourcing.

Source Coltan

Contact our Singapore trading desk for current assay reports, origin verification, and secure logistical handling.

Coltan is the ore from which Tantalum and Niobium are extracted. Tantalum is critical for manufacturing miniature capacitors used in smartphones and laptops, while Niobium is essential for high-strength, heat-resistant superalloys in jet engines.

We strictly follow the "Conflict-Free" sourcing protocols. Every shipment is tracked through a rigorous chain-of-custody system, providing documentation that ensures the minerals are not sourced from regions of armed conflict.

Coltan concentrate is typically packed in high-security, heavy-duty steel drums (approx. 250kg per drum). Due to its high value, shipments are tracked via GPS and handled with enhanced security protocols during maritime transit.

Yes. We provide comprehensive laboratory reports from independent third-party surveyors (SGS/AHK) that detail the exact percentages of Tantalum and Niobium, as well as the presence of any impurities.

Connect with our rare minerals specialists to discuss assay requirements, ethical compliance, and long-term contract pricing.

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