diallage

American  

[dahy-uh-lij] / ˈdaɪ ə lɪdʒ /

noun

Mineralogy.

1. a variety of diopside with a laminated structure, found in gabbro and other igneous rocks.

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diallage British  

/ ˈdaɪəlɪdʒ /

noun

1. a green or brownish-black variety of the mineral augite in the form of layers of platelike crystals

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Etymology

Origin of diallage

1795–1805; < French < Greek diallagḗ interchange, change, noun derivative from base of diallássein make an exchange, equivalent to di- di- ³ + allássein to change, exchange

Example Sentences

The following minerals produce beads with a small quantity of soda, but with the addition of more produce slags: tabular spar, diallage, hypersthene, epidote, zoisite.

From A System of Instruction in the Practical Use of the Blowpipe Being A Graduated Course Of Analysis For The Use Of Students And All Those Engaged In The Examination Of Metallic Combinations by Anonymous

These diabases, as they will be called generically, are usually composed of plagioclase feldspar, and diallage or augite; additional and rarer minerals are quartz, olivine, hypersthene, magnetite, ilmenite, and hornblende.

From History and Comprehensive Description of Loudoun County, Virginia by Head, James William

I found no traces of this grey copper: it is probably the metalloid diallage that has given the Cerro de Guanabacoa the reputation of riches in gold and silver which it has enjoyed for ages.

From Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 3 by Humboldt, Alexander von

The serpentine is sometimes of an esquillous, sometimes of a conchoidal fracture: this was the first time I had found metalloid diallage within the tropics.

From Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 3 by Humboldt, Alexander von

Essentially it is a crystalline-granular compound of plagioclase, generally Labradorite and diallage.

From Volcanoes: Past and Present by Hull, Edward