chiastolite

chiastolite is defined in Webster's Unabridged Dictionary (1913) with 1 sense. The full text of each entry is reproduced verbatim below.

Definitions

  1. 1.A variety of andalusite; -- called also macle. The tesselated apperance of a cross section is due to the symmetrical arrangement of impurities in the crystal.

Source: Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).

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