General Information:
Chemical Formula:(Mn,Ca)(La,Ce,Ca,Nd)AlMn+++Mn++(SiO4)(Si2O7)O(OH)
Environment:Forms a series with piemontite.
IMA Status:Approved IMA 1994
Locality:Found in a manganese-rich silicate-carbonate rock, Petalon Mountain, Andros Island, Cyclades, Greece.
Name Origin:Named after its discovery locality.
Physical Properties: Color:reddish brown.
Density:4.21
Diaphaniety:Transparent
Luster:Vitreous (Glassy)
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