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Coombsite Rhodonite

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GFM735734

Coombsite Rhodonite

Description Tabs

Description
Locality: 
Morro da Mina, Conselheiro Lafaiete, Minas Gerais, Brazil
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.2 × 1.6 × 1.6 cm
Description

brownish tabular crystals intergrown to very rich rounded 2mm aggregates, in a Quartz-Kutnohorite-Rhodonite matrix. Outstandingly good specimens, these are probably the finest-known Coombsite specimens

Mineral Data
What's on the rock

Coombsite

Formula: 
K(Mn,Fe,Mg)13(Si,Al)18O42(OH)14
Strunz: 
9.EG.35
Hardness: 
0.0
Type Locality: 
Watsons Beach, Otago, South Island, New Zealand

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