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Rhodonite With Brostenite

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LGM212715

Rhodonite With Brostenite

Ex Dr. Krantz, Bonn, Germany
With Antique Label

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Description Tabs

Description
Locality: 
Brosteni, Suceava County, Romania
Size Range: 
Cabinet (10-18 cm)
Size: 
6.5 × 11 × 1.1 cm
Description

Polished slab containing Mn and Fe carbonates and rhodonite. Comes with beautiful old label. The label means: "Rhodonite with brostenite". "Brostenit" is an old name for a mixture - cores of rhodochrosite altering to birnessite and todorokite, only described from Brosteni, Suceava Co., Romania. An very rare historic specimen.
Weight: 240 grams

Mineral Data
What's on the rock

Rhodonite

Formula: 
MnSiO3
Strunz: 
9.DK.05
Crystal System: 
Triclinic
Hardness: 
5.5 - 6.5
Streak: 
White
Type Locality: 
Kaiser Franz Mine (König Wilhelm Mine), Schävenholz (Schebenholz; Schäbenholz), Elbingerode, Harz, Saxony-Anhalt, Germany

Brostenite

Mixture Of: 

Birnessite

Formula: 
(Na,Ca)0.5(Mn4+,Mn3+)2O4·1.5H2O
Strunz: 
4.FL.45
Hardness: 
1.5

Rhodochrosite

Formula: 
MnCO3
Strunz: 
5.AB.05
Hardness: 
3.5 - 4.0

Todorokite

Formula: 
(Ca,K,Na,Mg,Ba,Mn)(Mn,Mg,Al)6O12·3H2O
Strunz: 
4.DK.10
Hardness: 
1.5

Seller Information

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