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Appearance, Uses and History
Chiastolite is a variant of opaque Andalusite with a very distinct cross shaped inclusion of Graphite.
During the 16th century this stone was distributed around Europe by pilgrims returning from Spain due to its obvious symbolism related to the Christian faith.
The best locale for Chiastolite is in Spain, the Asturias region.
It also occurs in Australia, China, France, Portugal, and the USA.
Photos of Chiastolite
Hazards and Warnings
Almost all rocks, minerals (and, frankly, almost all other substances on earth) can produce toxic dust when cutting, which can cause serious respiratory conditions including silicosis.
When cutting or polishing rocks, minerals, shells, etc, all work should be done wet to minimise the dust, and a suitable respirator or extraction system should be used.
Mandarin and Traditional Chinese: