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About Us
We are an import and Export company who deal mainly in Cotan(Columbite and Tantalite), Cassiterite, Rough Diamond, Platinum, Gold, wood, lumber or logs.
Coltan Specs:
listed below is the spcifications for the coltan that we have for sale:
Materials and Quality:
The following confirms the standard specifications of the African
Tantalite raw materials and their analysis:
Ta2O5 25 ?32 % (25 % min)
Nb2O5 38 ?46 % (38 % min)
Ta2O5 + Nb2O3 63 ?75 % (63 % min)
TiO2 3 % max.
SnO2 2 % ...
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