Heading 2604 : Nickel ores and concentrates.
The principal ores generally classified in this heading are :(a) Garnierite, double silicate of nickel and magnesium. (b) Niccolite (nickelin), nickel arsenide. (c) Pentlandite, sulphide of nickel and iron. (d) Nickeliferous pyrrhotite, nickel-bearing iron sulphide.
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