- An earthy carbonate of iron containing significant carbonaceous matter, valuable as an iron ore.
- An earthy carbonate of metal containing substantial carbonaceous matter; -- important as an iron ore.
- In mining and metallurgy, a type of iron ore, which consists really of carbonate of metal intimately mixed with coal.
- Definition for "blackband"
- An earthy carbonate of iron containing significant carbonaceous…
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- Sentence for "blackband"