Chiastolite

Chiastolite, actually andalusite with a dark cross is also called cross stone.
Chiastolite is found either in China, Chile, Australia, Algeria, Spain, Pyrenees and Russia.

Mineral class
Al2[O/SiO4] + C,Ca,Cr,Fe,Ga,K,Mg,Mn,Ti)

Mohs hardness: 5 - 5.5
density: 3.12 - 3.12
fissionability: imperfect
Line colour: white
Transparency: opaque

Healing Effects
Identity, realisation of life's task, promotes a sense of reality and sobriety, helps to dissolve feelings of guilt and fear