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Bonaccordite Bunsenite & Willemseite

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SKY617110

Bonaccordite Bunsenite & Willemseite

Type Locality

Description Tabs

Description
Locality: 
Scotia Talc Mine, Bon Accord, Barberton, Ehlanzeni District, Mpumalanga Province, South Africa
Class: 
Crystals on Matrix
Size Range: 
Micromount (under 1cm)
Size: 
0.6 × 0.4 × 0.2 cm
Description

Outstanding brown crystals of the extremely rare nickel mineral bonaccordite from the type and only known locality worldwide.

Associated minerals are green bunsenite, willemseite and black trevorite, so four rarities in a single specimen !.

Analyzed specimen by SEM-EDS see copy attached.

Mineral Data
What's on the rock

Bonaccordite

Formula: 
Ni2Fe3+(BO3)O2
Strunz: 
6.AB.30
Crystal System: 
Monoclinic
Hardness: 
7.0
Type Locality: 
Scotia Talc mine, Bon Accord, Barberton, Ehlanzeni District, Mpumalanga Province, South Africa

Bunsenite

Formula: 
NiO
Strunz: 
4.AB.25
Crystal System: 
Isometric
Hardness: 
5.5
Type Locality: 
Johanngeorgenstadt, Johanngeorgenstadt District, Erzgebirge, Saxony, Germany

Willemseite

Formula: 
(Ni,Mg)3(Si4O10)(OH)2
Strunz: 
9.EC.05
Hardness: 
0.0
Type Locality: 
Scotia Talc mine, Bon Accord, Barberton, Ehlanzeni District, Mpumalanga Province, South Africa

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