Adjective
Having, or characterized by, three unequal axes intersecting at oblique angles. See the Note under crystallization.
Source: Webster's dictionarytriclinic system Source: Internet
For triclinic, orthorhombic, and cubic crystal systems the axis designation is arbitrary and there is no principal axis. Source: Internet
Kyanite is triclinic, while andalusite and sillimanite are both orthorhombic and belong to the dipyramidal point group. Source: Internet
Microcline may be clear, white, pale-yellow, brick-red, or green; it is generally characterized by cross-hatch twinning that forms as a result of the transformation of monoclinic orthoclase into triclinic microcline. Source: Internet
Its crystal system is proven to be triclinic via X-ray diffraction testing. Source: Internet