Aurorite is a dark-colored mineral with the chemical formula (Mn2+,Ag,Ca)Mn4+3O7·3H2O. It is named for its type locality, the North Aurora mine in White Pine County, Nevada.[1]

Aurorite
Aurorite crystals found in calcite
General
CategoryMineral
Formula
(repeating unit)
(Mn2+,Ag,Ca)Mn4+3O7·3H2O
IMA symbolAro
Identification
ColorBlack, pale brown in transmitted light at the edges of very thin, platy grains
LusterMetallic
Specific gravity3.81

References

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