Kyannite n. : See Cyanite.

Example:


Taxonomy
Kyanite, minerals, free encyclopedia, silicate minerals, pressure, SiO2, polymorphs, hardness, axis, grey, columnar, characteristic, specimen, aluminium silicate, perpendicular axes, search, Triclinic, Imperfect.

Defination from the web:
Kyanite in metamorphic rocks generally indicates pressures higher than 4 kilobars. ... Kyanite is a member of the aluminosilicate series, which also includes the polymorph andalusite and the polymorph sillimanite. ...