
1) Mineral
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1) Ore
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https://www.crosswordclues.com/clue/millerite

Millerite is a nickel sulfide mineral, NiS. It is brassy in colour and has an acicular habit, often forming radiating masses and furry aggregates. It can be distinguished from pentlandite by crystal habit, its duller colour, and general lack of association with pyrite or pyrrhotite. == Paragenesis == Millerite is a common metamorphic mineral repla...
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http://en.wikipedia.org/wiki/Millerite

• (n.) A sulphide of nickel, commonly occurring in delicate capillary crystals, also in incrustations of a bronze yellow; -- sometimes called hair pyrites. • (n.) A believer in the doctrine of William Miller (d. 1849), who taught that the end of the world and the second coming of Christ were at hand.
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http://thinkexist.com/dictionary/meaning/millerite/

a nickel sulfide mineral (NiS) found in carbonate veins, as at Keokuk, Iowa, or as an alteration product of other nickel minerals, as at ...
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http://www.britannica.com/eb/a-z/m/92
Mil'ler·ite noun A believer in the doctrine of William
Miller (d. 1849), who taught that the end of the world and the second coming of Christ were at hand.
Found on
http://www.encyclo.co.uk/webster/M/66
Mil'ler·ite noun [ From W. H.
Miller , of Cambridge, Eng.]
(Min.) A sulphide of nickel, commonly occurring in delicate capillary crystals, also in incrustations of a bronze yellow; -- sometimes called
hair pyrites .
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http://www.encyclo.co.uk/webster/M/67

Millerite has the formulae NiS and a relative hardness of 4. It is the richest ore of nickel but too scattered to be commercially important. Forms at low temperatures often in cavities and as an altered form of other nickel minerals, or as a crystal inclusion in other minerals.
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http://www.probertencyclopaedia.com/browse/HM.HTM

Nickel sulfide, mono-
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http://www.translationdirectory.com/glossaries/glossary075.htm

[
n] - a yellow mineral consisting of nickel sulfide
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http://www.webdictionary.co.uk/definition.php?query=millerite
noun a yellow mineral consisting of nickel sulfide; a minor source of nickel
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https://www.encyclo.co.uk/local/20974
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