Color is typically blue to violet, but also pink and brown.
Luster is vitreous to dull.
Transparency: Crystals are translucent to transparent, massive specimens are nearly opaque.
Crystal System is orthorhombic; 2/m 2/m 2/m.
Crystal Habits include prismatic crystals but more commonly massive, columnar and fibrous.
Cleavage good in one direction and poor in four others, but rarely seen.
Fracture is uneven to hackly.

Hardness is 7 - 8.5

Occurence: Namibia, South Africa, Madagascar, France, Usa

Dumortierite meaning
This stone acts as an aid to your mental capabilities in overcoming tough situations. It opens the third eye chakra to enhance mental (and emotional) intelligence.

Learning Stone
Dumortierite promotes mental discipline especially in regard to learning new things. Students find it useful when they are required to take in large amounts of data over short periods of time, because it aids memory.