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Encyclopedia Britannica - Main :: BRI-BUN |
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BRONZITE , a member of the pyroxene group of minerals, belonging with enstatite
series of the group. Rather than a distinct species, it is really a ferriferous variety of enstatite
magnesia
oxide
oxide
IV. 2I 64,1 iron there is a passage to hypersthene. The ferriferous varieties are liable to a particular kind of alteration, known as " schillerization," which results in the separation of the iron as very fine films of oxide and hydroxides along the cleavage cracks of. the mineral
Bronzite is sometimes cut and polished, usually in convex forms, for small ornamental objects, but its use for this purpose is less extensive than that of hypersthene. It often has a more or less distinct fibrous structure, and when this is pronounced the sheen has a certain resemblance to that of cat's-eye. Masses sufficiently large for cutting are found in the norite of the Kupferbergin the Fichtelgebirge
original
pale greyish-green bastite are embedded in a darker-coloured serpentine. This rock
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