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Dumortierite in Quartz

#52318
SOLD
Dumortierite from Vaca Morta mine, Bahia, Brazil - 52318
Dumortierite from Vaca Morta mine, Bahia, Brazil - 52318

Dumortierite in Quartz

#52318
Availability
Sold
Size
1.6 x 1.3 x 1.2 cm - Thumbnail 
Formula
(Al,□)Al6BSi3O16(O,OH)2 (RRUFF)
Locality
Vaca Morta mine, Bahia, Brazil

The blue really came out in these photos and it is not really that flooded with blue. There are though real fine microscopic fibrous crystals.

Dumortierite

Formula
(Al,[ ])Al6BSi3O16(O,OH)2 
Crystal System
Orthorhombic 
Crystal Habit
Columnar, Fibrous, Prismatic 
Cleavage
Good, Indistinct, None 
Luster
Vitreous (Glassy) 
Color
blue, brown, violet, greenish blue, pink 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Fibrous 
Hardness
8.5 

Data courtesy of Webmineral.

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