From The Collaborative International Dictionary of English v.0.48 [gcide]:
Crocidolite \Cro*cid"o*lite\ (kr?-s?d"?-l?t), n. [Gr. kroky`s
nap on cloth + -lite.] (Min.)
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.
[1913 Webster]