Crocidolite /(kr?-s?d"?-l?t)/

Cro·cid·o·lite

Crocidolite

n.
  1. A mineral occuring in silky fibers of a lavender blue color. It is related to hornblende and is essentially a silicate of iron and soda; -- called also blue asbestus. A silicified form, in which the fibers penetrating quartz are changed to oxide of iron, is the yellow brown tiger-eye of the jewelers. (Min.)