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Ernstite Psm Childrenite

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QRI640959

Ernstite Psm Childrenite

Description Tabs

Description
Locality: 
Linópolis, Divino das Laranjeiras, Doce Valley, Minas Gerais, Brazil
Class: 
Single Crystal
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.5 × 1.9 × 0.7 cm
Weight: 
16.00gr
Description

Outstanding ernstite pseudomorphing a childrenite crystal. With very good lustre for the specie and excellently defined faces and edges, it comes with minimal bruises and in great conditions. The original childrenite crystal appears to be a floater, as no contact points appear and both terminations are perfectly in place.
One interesting feature is the crack at the middle of the crystal. It does not appear as a repair (not tested in acetone) as the growth patterns on the prism are perfectly parallel. I would rather consider this being a tectonic damage, naturally rehealed shortly after.
I was not able to find extensive literature on these specimens. Although, to my understanding, this is one of the best known crystals for this type of pseudomorphs. 
Very rare and sought-after. From the former 'Jim' Thomas collection, it comes in its original perky box.

Boxed with Label
Mineral Data
What's on the rock

Ernstite

Formula: 
(Mn2+,Fe3+)Al(PO4)(OH,O)2·H2O
Strunz: 
8.DD.20
Hardness: 
3.0 - 3.5
Type Locality: 
Davib East Farm 61 (Davib Ost Farm), Karibib District, Erongo Region, Namibia

Childrenite

Formula: 
(Fe2+,Mn2+)Al(PO4)(OH)2·H2O
Strunz: 
8.DD.20
Hardness: 
5.0
Streak: 
White
Type Locality: 
Tavistock District, Devon, England, UK

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