chiastolite


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chi·as·to·lite

 (kī-ăs′tə-līt′)
n.
A mineral variety of andalusite with carbonaceous impurities regularly arranged along the longer axis of the crystal.

[From Greek khīastos, crossed, past participle of khīazein, to mark with an X; see chiasma.]

chiastolite

(kaɪˈæstəˌlaɪt)
n
(Minerals) a variety of andalusite containing carbon impurities. Also called: macle
[C19: from German Chiastolith, from Greek khiastos crossed, marked with a chi + lithos stone]
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References in periodicals archive ?
The Northern Karakoram Terrane comprises sedimentary units such as Pasu limestones, Pasu slates, chiastolite slates and precollision K2 orthogneiss and granites.
CHIASTOLITE CROSS STONES SPEAKER MARY ANNE MACLEOD: on Sunday, Nov.
The exact shape of the sectors, like those in the chiastolite variety of andalusite, varies from crystal to crystal, and along the length of a single crystal.