chiastolite

American  

[kahy-as-tl-ahyt] / kaɪˈæs tlˌaɪt /

noun

1. a variety of the mineral andalusite having cruciform carbonaceous inclusions.

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chiastolite British  

/ kaɪˈæstəˌlaɪt /

noun

1. Also called: macle.  a variety of andalusite containing carbon impurities

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Etymology

Origin of chiastolite

1795–1805; alteration of chiastolith ( -lite ), equivalent to Greek chiastó ( s ) set crosswise ( chiasma ) + -lith

Example Sentences

The granites pass into gneiss and granulite; the gabbros into flaser gabbro and amphibolite; the slates often contain andalusite or chiastolite, and show transitions to mica schists.

From Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" by Various

The andalusite may be pink and is then often pleochroic in thin sections, or it may be white with the cross-shaped dark enclosures of the matrix which are characteristic of chiastolite.

From Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 6 "Home, Daniel" to "Hortensius, Quintus" by Various

The rocks consist of a clay-slate, with crystals resembling chiastolite and crystals of sulphide of iron interspersed.

From The Voyage of the Vega round Asia and Europe, Volume I and Volume II by Leslie, Alexander, fl. 1879-1882