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Gravegliaite & Alabandite

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SKY567421

Gravegliaite & Alabandite

Rare Mineral

Description Tabs

Description
Locality: 
Merelani Hills, Arusha Region, Tanzania (United Republic)
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3 × 1.8 × 1.2 cm
Description

Olive microcrystals of the extremely rare mineral gravegliaite grown on a big alabandite crystal from the classic locality of Merelani.

Gravegliaite has only been found in 3 localities worldwide, and it one of the very few sulphites known  !

Analyzed by Gunnar Faerber.

Mineral Data
What's on the rock

Gravegliaite

Formula: 
Mn2+SO3·3H2O
Strunz: 
4.JE.05
Hardness: 
0.0
Type Locality: 
Valgraveglia Mine (Gambatesa Mine), Reppia, Graveglia Valley, Ne, Genova Province, Liguria, Italy

Alabandite

Formula: 
MnS
Strunz: 
2.CD.10
Crystal System: 
Isometric
Hardness: 
3.5 - 4.0
Type Locality: 
Sacarîmb (Sãcãrâmb; Szekerembe; Nagyág), Deva, Hunedoara Co., Romania

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