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Aragonite Goethite & Chalcedony

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ESM729369

Aragonite Goethite & Chalcedony

Description Tabs

Description
Locality: 
Tizi-n-Tichka, Ouarzazate Province, Drâa-Tafilalet Region, Morocco
Class: 
Combination
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 5.5 × 3 cm
Description

Spherical sprays of white aragonite needles lining a geode Chalcedony and black goethite needles

Mineral Data
What's on the rock

Aragonite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.15
Crystal System: 
Hexagonal
Hardness: 
3.5 - 4.0
Type Locality: 
Gallo river, Molina de Aragón, Guadalajara, Castile-La Mancha, Spain

Goethite

Formula: 
α-Fe3+O(OH)
Strunz: 
4.00.
Crystal System: 
Orthorhombic
Hardness: 
5.0 - 5.5
Type Locality: 
Hollertszug Mine (Hollerter Zug Mine), Dermbach, Herdorf, Siegerland, Rhineland-Palatinate, Germany

Chalcedony

Variety Of: 

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Hardness: 
7.0
Hardness: 
6.5 - 7.0
Streak: 
White
Type Locality: 
Kadıköy (Chalcedon), Istanbul Province, Marmara Region, Turkey