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Deerite & Lawsonite

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UVM715923

Deerite & Lawsonite

Type Locality

Description Tabs

Description
Locality: 
Laytonville Quarry, Laytonville, Mendocino County, California, United States of America
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 2.4 × 2.3 cm
Description

Black intergrown crystals of deerite from the type locality, with minor lawsonite intergrown.

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...

Lawsonite

Formula: 
CaAl2(Si2O7)(OH)2·H2O
Strunz: 
9.BE.05
Hardness: 
7.5
Streak: 
white
Type Locality: 
Reed Station, Tiburon Uplands Nature Preserve, Tiburon Peninsula, Marin Co., California, USA

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