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Deerite & Howieite

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SHS72053

Deerite & Howieite

Description Tabs

Description
Locality: 
Laytonville Quarry, Laytonville, Mendocino County, California, United States of America
Size Range: 
Thumbnail (1-3cm)
Size: 
2.5 × 2 × 1.7 cm
Description

Deerite and howieite on matrix

Mineral Data
What's on the rock

Deerite

Formula: 
(Fe,Mn)6(Fe,Al)3[Si6O17]O3(OH)5
Strunz: 
9.DH.60
Crystal System: 
Monoclinic
Hardness: 
6.0
Colour: 
Black
Streak: 
Dark gray
Type Locality: 
Laytonville Quarry ("Longvale"; "Longvale Quarry"), Laytonville, Coastal Range, Mendocino Co., California, USA...

Howieite

Formula: 
Na(Fe,Mn)10(Fe,Al)2Si12O31(OH)13
Strunz: 
9.DH.65
Hardness: 
0.0
Type Locality: 
Laytonville Quarry ("Longvale"; "Longvale Quarry"), Laytonville, Coastal Range, Mendocino Co., California, USA...