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Pennantite Tephroite & Garnet

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SHS189038

Pennantite Tephroite & Garnet

Description Tabs

Description
Locality: 
Harstigen Mine, Pajsberg, Persberg, Filipstad, Värmland County, Sweden
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.7 × 5.8 × 4.5 cm
Description

Pennantite with tephroite and garnet in matrix

Mineral Data
What's on the rock

Pennantite

Formula: 
Mn2+5Al(AlSi3O10)(OH)8
Strunz: 
9.EC.55
Hardness: 
2.0 - 2.5
Type Locality: 
Benallt Mine (Tyddyn Meirion mine; Ty Canol mine), Rhiw, Llanfaelrhys, Lleyn Peninsula, Gwynedd (Caernarvonshire), Wales, UK

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