plural of chiastolite

(mineralogy) An aluminosilicate mineral having carbon inclusions, a variety of andalusite.

Containing or relating to the mineral chiastolite.

(mineralogy) A rock formed by contact metamorphism of carbonaceous shale, characterized by prominent cleavage or schistosity and the presence of conspicuous chiastolite crystals in a fine-grained groundmass.

plural of chiastolite slate