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Deerite

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PDM772437

Deerite

Type Locality

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 × 3.5 × 2.2 cm
Description

Piece of metavolcanic blueschist rock with lustrous black prismatic to acicular deerite crystals in a matrix of blue sprays of riebeckite. The Laytonville Quarry is the type locality of deerite.

Exchanged in 1977 with US collector Jessie Hardman by René Virlet.

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...

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