Chiastolite (macle) is a variety of andalusite with cross-shaped passive inclusion pattern of graphite. The tessellated appearance of a cross section is due to the symmetrical arrangement of impurities in the crystal.
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Chiastolite (macle) is a variety of andalusite with cross-shaped passive inclusion pattern of graphite. The tessellated appearance of a cross section is due to the symmetrical arrangement of impurities in the crystal.
Related terms: