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Howieite & Deerite

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HCH502428

Howieite & Deerite

ex R.R. Lobel, Hayward, California

Description Tabs

Description
Locality: 
Laytonville Quarry, Laytonville, Mendocino County, California, United States of America
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 3 × 2 cm
Description

Intergrown black sprays up to 1.5 cm diameter.

Mineral Data
What's on the rock

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...

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...

Seller Information

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