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Franciscanite

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ESM586474

Franciscanite

Type Locality

Description Tabs

Description
Locality: 
Pennsylvania Mine, Sugarloaf Mountain, Santa Clara County, California, United States of America
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 2.8 × 2.5 cm
Description

Red-brown franciscanite on matrix

Mineral Data
What's on the rock

Franciscanite

Formula: 
Mn2+6(V5+,☐)2(SiO4)2(O,OH)6
Strunz: 
9.AF.75
Hardness: 
4.0
Type Locality: 
Pennsylvania Mine, San Antonio Valley, Mount Hamilton, Black Wonder District, Diablo Range, Santa Clara Co., California, USA