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Alleghanyite With Galaxite

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QRI683390

Alleghanyite With Galaxite

Former collection Christian Mavris
Type Locality

Description Tabs

Description
Locality: 
Bald Knob, Sparta, Alleghany County, North Carolina, United States of America
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.9 × 1.2 × 0.4 cm
Description

From my systematic collection, a rich thin speck of white kutnohorite hosting myriads of alleghanyite (red) and galaxite (black). Among galaxite crystals, there is possibly some jacobsite, also black and known to occur in this paragenesis. The yellow specks occurring here in and there should be kellyite, although quite small and scarse. All species are quite lustrous and can be best appreciated with a 10x magnification. The older hardened tack from previous collectors is an indication of the poorer area of the specimen.
A very rich specimen for these rare species, I have acquired it over 15 years ago from a US collector, when I collecting systematics. It comes in its original labelled box.

Boxed with Label
Mineral Data
What's on the rock

Alleghanyite

Formula: 
Mn2+5(SiO4)2(OH)2
Strunz: 
9.AF.45
Crystal System: 
Monoclinic
Hardness: 
5.5
Type Locality: 
Bald Knob, Sparta, Alleghany County, North Carolina, United States of America

Galaxite

Formula: 
(Mn,Fe,Mg)(Al,Fe)2O4
Strunz: 
4.BB.05
Hardness: 
7.5
Type Locality: 
Bald Knob deposit (Primary ore body; Crouse Knob deposit), Bald Knob, Sparta, Alleghany Co., North Carolina, USA

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