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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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, 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 ?
To engage in ethical leadership is not to tap into a loadstone a pre-existing mass of ready-made answers.
Loadstone Provides route guidance by Navigation GPS guiding the user from point mode and (Loadstone to point on a manually exploration GPS team, created route (heading, mode n.
The depth of British education carries with it the loadstone of monodirectional viewpoints, sharply focused upon excellence within a singularly narrow frame.
Fleury Mottelay (On the Loadstone, 1893), reprinted in Great Books of the Western World, vol 28: Gilbert, Galileo, Harvey (Chicago: Great Books, 1952).
Thales of Miletus (a flourishing commercial city in what is now part of Turkey) had observed that loadstone attracted iron.
It will chagrin you to learn that this locomotive loadstone has on a seventy-five cent hat, of simple straw--dress of lawn, one shilling per yard--a twenty-five cent collar, and a shawl of the most unpretending price and fabric.
The situation of tenderness producing pain had its literary equivalent in the sequence of poems that had become the loadstone for imagining the conflation of tenderness and pain: Petrarch's Canzoniere.
But if Americans want additional assurances that our domestic economy will not be crippled by instability abroad, the best policy is to reduce the loadstone of America's enormous external debt.
These Yahoos, a very few Granted, must further be advised to learn a second language, Jargon, exemplified by the Academy description of the Laputan Loadstone (142) and the precise language of the Mariner (64).
turned every way under the influence of the strong polarity of the loadstone rock .
The most important thing he did, however, was to take a large piece of loadstone and fashion a globe out of it.
And looming behind Athens medieval and modern is the touristic loadstone of the city-- the rocky Acropolis, crowned by the Parthenon, today covered by a web of scaffolding while titanium support rods are inserted in the columns to replace the present iron rods, which discolor the Attic marble.