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Chamosite var. daphnite

#PD30939
SOLD
Chamosite from Tolgus mine, Redruth, Cornwall, England - PD30939
Chamosite from Tolgus mine, Redruth, Cornwall, England - PD30939

Chamosite var. daphnite

#PD30939
Availability
Sold
Size
7 x 5 x 5 cm - Sm Cabinet 
Formula
(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 (RRUFF)
Locality
Tolgus mine, Redruth, Cornwall, England

Green granular Chamosite with individual crystals less than 1mm in most areas o fthe specimen. Chamosite is a phyllosilicate but not a mica, but is a member of the chlorite group with mica sheets. It is also the iron analogue of Chlorite. The chrystal chemistry of Chamosite thus gives way to a micaceous habit, just not in large sheets like a mica group mineral. Chamosite was named for Chamoson, Switzerland, where it was forst home.

Chamosite

Formula
(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 
Crystal System
Monoclinic 
Crystal Habit
Oolitic, Granular 
Cleavage
Good, None, None 
Luster
Vitreous - Dull 
Color
gray, greenish gray, brown, blackish green 
Streak
grayish green 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
3 

Data courtesy of Webmineral.

Collection
Phillips Collection
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Previously Sold Chamosite
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