Chiastolite

Chiastolite is a variety of the mineral andalusite with the chemical composition Al2SiO5. It is noted for distinctive cross-shaped black inclusions of graphite. In areas around Georgetown, California, metamorphosed sediments contained andalusite and chiastolite in a graphite rich metasediment. The chiastolite crystals have been pseudomorphically a...
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Chiastolite

• (n.) A variety of andalusite; -- called also macle. The tessellated appearance of a cross section is due to the symmetrical arrangement of impurities in the crystal.
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Chiastolite

Chi·as'to·lite (ki*ăs'to*līt) noun [ Greek chiasto`s marked with a χ + -lite . See Chiasm . So called from the resemblance of the cross cuts of its crystals to the Greek letter χ.] (Min.) A variety of andalusite; -- called also macle . ...
Found on http://www.encyclo.co.uk/webster/C/63

Chiastolite

A metamorphic mineral, Chiastolite is a variety of Andalusite. It contains cross-shaped inclusions of carbon.
Found on http://www.allaboutgemstones.com/glossary_gemology.html

chiastolite

a variety of the mineral andalusite (q.v.).[2 related articles]
Found on http://www.britannica.com/eb/a-z/c/67

Chiastolite

Chiastolite (macle) is a variety of andalusite. The tessellated appearance of a cross section when it is sliced, is due to the symmetrical arrangement of impurities in the crystal.
Found on http://www.probertencyclopaedia.com/browse/HC.HTM
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