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Cuspidine & Magnetite & Grossular

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SHS138269

Cuspidine & Magnetite & Grossular

Description Tabs

Description
Locality: 
Mackay District, Custer County, Idaho, United States of America
Size Range: 
Thumbnail (1-3cm)
Size: 
1.3 × 0.6 × 0.5 cm
Description

Cuspidine with magnetite and grossular in matrix

Mineral Data
What's on the rock

Cuspidine

Formula: 
Ca4(Si2O7)(F,OH)2
Strunz: 
9.BE.17
Hardness: 
5.0 - 6.0
Streak: 
White
Type Locality: 
Monte Somma, Somma-Vesuvius Complex, Naples Province, Campania, Italy

Magnetite

Formula: 
Fe2+Fe3+2O4
Strunz: 
4.BB.05
Crystal System: 
Isometric
Hardness: 
5.5 - 6.5
Streak: 
Black

Grossular

Formula: 
Ca3Al2(SiO4)3
Strunz: 
9.AD.25
Hardness: 
6.5 - 7.0
Type Locality: 
Akhtaragda River mouth (Achtaragda River mouth), Vilyui River Basin (Vilui River Basin; Wilui River Basin), Sakha Republic (Saha Republic; Yakutia), Eastern-Siberian Region, Russia