
1) Bog ore 2) Iron ore
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https://www.crosswordclues.com/clue/limonite

1) Iron ore 2) Iron ore
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https://www.crosswordclues.com/clue/limonite

Limonite is an iron ore consisting of a mixture of hydrated iron(III) oxide-hydroxides in varying composition. The generic formula is frequently written as FeO(OH)·nH2O, although this is not entirely accurate as the ratio of oxide to hydroxide can vary quite widely. Limonite is one of the two principal iron ores, the other being hematite, and has...
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http://en.wikipedia.org/wiki/Limonite

• (n.) Hydrous sesquioxide of iron, an important ore of iron, occurring in stalactitic, mammillary, or earthy forms, of a dark brown color, and yellowish brown powder. It includes bog iron. Also called brown hematite.
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Hydrous oxide of iron, FeO(OH)-nH2O.
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one of the major iron minerals, hydrated ferric oxide (FeO(OH)nH2O). It was originally considered one of a series of such oxides; later it was ... [2 related articles]
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http://www.britannica.com/eb/a-z/l/52
Li'mon·ite (lī'mŏn*īt)
noun [ Greek
leimw`n any moist grassy place, a meadow : confer French
limonite , German
limonit .]
(Min.) Hydrous sesquioxide of iron, an important ore of iron, occurring in stalactitic, mammillary, or earthy forms, of a dark b...
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http://www.encyclo.co.uk/webster/L/43

A major type of iron ore. See also haematite and magnetite.
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http://www.metalbulletin.com/Glossary.html

Limonite is the hydrated oxide of iron. It never occurs crystallised, but in fibrous, earthy, stalactitic mammillary, porous, or concretionary masses, and often as pseudomorphs formed by the weathering of other minerals such as pyrites or marcasite. It is black or brown in colour and the streak or fine powder is yellow, distinguishing it from haema...
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http://www.probertencyclopaedia.com/browse/HL.HTM

[
n] - a widely occurring iron oxide ore
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http://www.webdictionary.co.uk/definition.php?query=limonite
noun a widely occurring iron oxide ore; a mixture of goethite and hematite and lepidocrocite
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A brown, hydrous iron oxide.
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https://www.encyclo.co.uk/local/22734
(Hydrated Iron Oxide) Limonite is not a true mineral but a mixture of similar hydrated iron oxide minerals. Most of limonite is made up of Goethite . Massive Goethite and Limonite can be indistinguishable. Limonite forms mostly in or near oxidized iron and other metal ore deposits, and as sedimentary beds. Limonite has been kn...
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https://www.encyclo.co.uk/local/23719
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