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2008-05-14 03:00:23

By Lupulescu, Marian The principal goal of this article is to present the impor- tant minerals from the New York State iron deposits. Not all the minerals identified in these deposits can be seen by the naked eye; some are found only in thin sections, and others are not aesthetically impressive, making them of limited collector interest. In general, these will not be noted here, except for those that represent very rare occurrences; they will be mentioned along with their localities, but...


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2005-05-26 09:20:28

Magnetite is a magnetic mineral form of both iron(II) oxide and iron(III) oxide or (iron(II,III) oxide), with chemical formula Fe3O4, one of several iron oxides and a member of the spinel group. Magnetite is the most magnetic of all the minerals on Earth, and these magnetic properties led to lodestone being used as an early form of magnetic compass. Small grains of magnetite occur in almost all igneous rocks and metamorphic rocks as well as many sedimentary rocks. Magnetite is a...

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Word of the Day
grass-comber
  • A landsman who is making his first voyage at sea; a novice who enters naval service from rural life.
According to the OED, a grass-comber is also 'a sailor's term for one who has been a farm-labourer.'