lodestone


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lodestone:

see magnetitemagnetite
, lustrous black, magnetic mineral, Fe3O4. It occurs in crystals of the cubic system, in masses, and as a loose sand. It is one of the important ores of iron (magnetic iron ore) and is a common constituent of igneous and metamorphic rocks.
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lodestone

[′lōd‚stōn]
(mineralogy)
The naturally occurring magnetic iron oxide, or magnetite, possessing polarity, and attracting iron objects to itself. Also known as Hercules stone; leading stone; loadstone.

lodestone

, loadstone
a. a rock that consists of pure or nearly pure magnetite and thus is naturally magnetic
b. a piece of such rock, which can be used as a magnet and which was formerly used as a primitive compass
References in periodicals archive ?
In summary, the Lodestone Global 2014 Private Company Board Compensation Survey found the following data points with respect to female directors:
Release date- 22102012 - Bangalore - Infosys, a global leader in consulting and technology, today announced it has completed the acquisition of Lodestone Holding AG, a leading management consultancy based in Switzerland.
The outsourcer said it was acquiring Lodestone for an aggregate enterprise value of 330 million Swiss francs (US$350 million) in cash.
Main Concept: Magnetite, sometimes called lodestone, is a natural magnet.
Plans for the Las Vegas lodestone, set to open in 2013, are part of the budding business relationship between the acrobatic troupe and the pop star's estate.
They first used a lodestone or natural magnetised iron ore.
The geese fly North, East, West, and South, the route woven in their blood, into a lodestone of brain no larger than a walnut.
the Chinese found that a piece of lodestone, a naturally magnetic mineral, would line up to Earth's north-south magnetic field.
After reviewing early observations by the Greeks and Chinese about the magnetic properties of lodestone, the book describes research performed by William Gilbert, Edmond Halley, Karl Friedrich Gauss, Hans Orsted, Ander Marie Ampere, Michael Faraday, James Clerk Maxwell, and modern geophysicists.
Series 2010-1 Class B May 6 Johnston Re Ltd Class A NC JUA/IUA May 6 Johnston Re Ltd Class B May 12 Lodestone Re Ltd Class A National Union (Chartis) May 12 Lodestone Re Ltd Class B May 19 EOS Wind Limited Class A Munich Re May 19 EOS Wind Limited Class B May 21 Caelus Re II Nationwide Limited Class A May 25 Blue Fin Series 3 Class A Allianz May 25 Blue Fin Series 3 Class B May 28 Residential Re 2010-1 USAA May 28 Residential Re 2010-2 May 28 Residential Re 2010-3 May 28 Residential Re 2010-4 Issue Date Transaction/Tranche Name Covered Peril(s) April 1 Merna Re II Ltd New Madrid Quake April 27 Ibis Re Ltd.
A lodestone or piece of magnetic rock was an early form of which direction finding instrument?
The magnetic mineral lodestone is an ore of which metal?