What's the difference between andalusite and chiastolite?
Andalusite
Definition:
(n.) A silicate of aluminium, occurring usually in thick rhombic prisms, nearly square, of a grayish or pale reddish tint. It was first discovered in Andalusia, Spain.
Example Sentences:
Chiastolite
Definition:
(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.