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Pyrochroite: Mn(OH)2
Comments: Pseudo-cubic crystal of pyrochroite on matrix. Location: Franklin, Sussex County, New Jersey, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Pyrochroite: Mn(OH)2 Shigaite: Mn++7Al4(SO4)2(OH)22·8(H2O)
Comments: Bronzy yellow crystals of shigaite set in a crystalline matrix of reddish black pychroite. Location: N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: 2.8 x 2.3 cm. © John Veevaert