Entry from British & World English dictionary
Definition of kidney ore in English:
Haematite occurring in rounded, kidney-shaped masses.
- It produced a large number of fine specimens of grape ore and kidney ore.
- Hematite specimens occurring as ‘kidney ore’ were found to some degree in most of the area's mines.
- Typically the Furness haematite is found in rounded masses, resembling animal kidneys, and so is known as kidney ore.
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