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Glaucophane

#DP25809
SOLD
Glaucophane from Brosso mine, Calea, Torino, Piedmont, Italy - DP25809
Glaucophane from Brosso mine, Calea, Torino, Piedmont, Italy - DP25809

Glaucophane

#DP25809
Availability
Sold
Size
3 x 3 x 2 cm - Thumbnail 
Formula
□Na2(Mg3Al2)Si8O22(OH)2 (RRUFF)
Locality
Brosso mine, Calea, Torino, Piedmont, Italy

Bluish grey acicular crystals of Glaucophane, an amphibole, embedded in matrix.

Glaucophane

Formula
[box]Na2(Mg3Al2)Si8O22(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Massive - Fibrous, Columnar, Granular 
Cleavage
Good, Good, None 
Luster
Vitreous - Pearly 
Color
gray, bluish black, lavender blue, azure blue 
Streak
grayish blue 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Conchoidal 
Hardness
6-6.5 

Data courtesy of Webmineral.

Collection
Polak Collection
Mineralpedia
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On Dakota Matrix
Previously Sold Glaucophane
On Dakota Matrix
Other Available Glaucophane
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Mindat
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Other Sold

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