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Metacinnabar

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PDM704748

Metacinnabar

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Description
Locality: 
Mount Diablo Mine, Clayton, Contra Costa County, California, United States of America
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.2 × 2 × 2 cm
Description

Dozens of dark red to black crystals of metacinnabar, an uncommon polymorph of cinnabar, up to 1 mm in size, on a silicified matrix.

Acquired in 1974. Ex. René Virlet specimen.

Mineral Data
What's on the rock

Metacinnabar

Formula: 
HgS
Strunz: 
2.CB.05a
Hardness: 
3.0
Type Locality: 
Redington Mine (Boston Mine; Knoxville Mine; Excellsior Mine), Knoxville, Knoxville District, Napa Co., California, USA

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