Pyrochroite

Locality: Långban, Filipstad, Värmland, Sweden Photo Copyright © Pavel M. Kartashov collection & photo

Chemical Formula: Mn(OH)2
Locality: Vermland at Pajsberg near Persberg, Sweden.
Name Origin: Named from the Greek, puro, “fire” and khroma, “color”, because of the change in color upon ignition.

History

Authors  : IGELSTROEM
Discovery date: 1864
Town of Origin : PAJSBERG, FILIPSTAD, VARMLAND
Country of Origin : SUEDE

Optical properties

Optical and misc. Properties: Flexible  –   Transparent  –   Translucide  –   Opaque  –
Refractive Index : from 1,68 to 1,72

Physical properties

Hardness : 2,50
Density : 3,25
Color: colorless; white; pale green; blue; brown; black; bronze yellow; bluish; greenish; bluish green
Luster: nacreous; unpolished
Streak : white
Cleavage : yes

Photos :

Pyrochroite Comments: Pseudo-cubic crystal of pyrochroite on matrix. Location: Franklin, Sussex County, New Jersey, USA. Copyright: © Lou Perloff / Photo Atlas of Minerals
Hauckite, Pyrochroite Locality: Sterling Mine, Sterling Hill, Ogdensburg, Franklin Mining District, Sussex County, New Jersey, USA Size: 2.6 x 1.7 x 1.1 cm.     © Rob Lavinsky / iRocks
Pyroaurite, Pyrochroite Locality: Långban, Filipstad, Värmland, Sweden Size: 9.6 x 7.2 x 1.8 cm. © Rob Lavinsky / iRocks
Pyrochroite , Shigaite Location: N’Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: 2.8 x 2.3 cm. Copyright: © John Veevaert
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