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Minerals - Dumortierite | TerraCollect
Mineral - Dumortierite
Dumortierite
Al₆,5–7[(O,OH)₃|BO₃|(SiO₄)₃]
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
Al₆,5–7[(O,OH)₃|BO₃|(SiO₄)₃]
Unit Cell
Physical Properties
Hardness
7 - 8
Streak
white
Density
Normal (2-3,5)
Optical Properties
Color
blue
violet
Birefringence
Luster
Vitreous
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
orthorhombic
Point Group
Cleavage
Fracture
Tenacity
Space Group
Habit
fibrous,
massive,
radial
Formation
Metamorphose
Paragenesis
Twinning
Rarity
Common
Synonyms
Dumortierite
