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Vivianite with Childrenite

#AH53924

Vivianite with Childrenite

#AH53924
Availability
Sold
Size
4.5 x 3.5 x 2 cm - Miniature 
Formula
Fe2+3(PO4)2·8H2O (RRUFF)
Locality
Siglo Viente mine, Llallagua, Bolivia
Tagged
phosphate

This is a very impressive specimen of Vivianite once in the collection of Friedrich Ahlfeld, the Father of Bolivian Geology. It was also in the collection of the late Bill Roberts, author of the Encyclopedia of Minerals

The specimen features an excellent deep green Vivianite crystal to 1.4cm. There are several other crystals on the base matrix, but they are frosted over with mostly Pyrite but also Paravauxite and Childrenite. The Childrenite crystals are the brownish red sparkly balls in the photos. The Paravauxite are the light yellow to colorless bladed crystals.

Vivianite

Formula
Fe2+3(PO4)2·8H2
Crystal System
Monoclinic 
Crystal Habit
Divergent, Concretionary, Earthy 
Cleavage
Perfect, None, None 
Luster
Vitreous - Pearly 
Color
colorless, green, blue, dark green, dark bluish green 
Streak
bluish white 
Class
Monoclinic - Prismatic 
Fracture
Sectile 
Hardness
1.5-2 

Data courtesy of Webmineral.

Collection
Willard L. Roberts Collection
Mineralpedia
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On Dakota Matrix
Previously Sold Vivianite
On Dakota Matrix
Other Available Vivianite
WebMineral
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Mindat
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