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Bustamite & Tephroite

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JYJ715759

Bustamite & Tephroite

With Antique Label

Description Tabs

Description
Locality: 
Långban, Filipstad, Värmland County, Sweden
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.5 × 6.5 × 5.3 cm
Description

Glassy impregnations of tephroite, that appears bluish in bistabile/rhodonite matrix. Historic specimen with a machine written label dating to 1972. The tephroite was confirmed by means of SEM-EDS. 

 

Mineral Data
What's on the rock

Bustamite

Formula: 
CaMn2+(Si2O6)
Strunz: 
9.DG.05
Hardness: 
5.5 - 6.5
Streak: 
White
Type Locality: 
Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA

Tephroite

Formula: 
Mn2+2SiO4
Strunz: 
9.AC.05
Crystal System: 
Orthorhombic Forms short prismatic crystals.
Hardness: 
6.0
Streak: 
Pale gray
Type Locality: 
Sterling Mine, Sterling Hill, Ogdensburg, Franklin Mining District, Sussex Co., New Jersey, USA
Labels
Label Images - only: Bustamite & Tephroite