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Sigismundite

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SKY1048013

Sigismundite

Rare Mineral

Description Tabs

Description
Locality: 
Buranga Pegmatite, Gatumba, Ngororero District, Western Province, Rwanda
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 1.5 × 0.8 cm
Description

Outstanding green crystal aggregates of the very rare Ba-Fe phosphate mineral sigismundite from a Buranga pegmatite in Rwanda, associated to pyrite and phosphosiderite.

Sigismundite from Rwanda is green , not beige as in other localities

Mineral Data
What's on the rock

Sigismundite

Formula: 
(Ba◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2
Strunz: 
8.BF.
Crystal System: 
Monoclinic
Colour: 
Grayish-green
Streak: 
White
Type Locality: 
Groppera Alp, Madesimo, Sondrio Province, Lombardy, Italy

Current price

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65
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Start 15 May 18:00
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Spain
6
Europe
9
Rest of the World
10

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