Glaucochroite is a calcium manganese nesosilicate mineral with formula CaMnSiO4. It occurs in metamorphosed limestones.

Glaucochroite
Glaucochroite found in New Jersey
General
CategorySilicate mineral
Formula
(repeating unit)
CaMnSiO4
Strunz classification9.AC.05
Dana classification51.3.2.3
Crystal systemOrthorhombic
Identification
ColorBluish-gray, pink, brown, or white
FractureConchoidal, sub-conchoidal
Mohs scale hardness6
LusterVitreous, sub-vitreous, resinous
Streakwhite
Optical propertiesBiaxial (−)
References[1]

It was first described in 1899 in Franklin Furnace, Sussex County, New Jersey.

References

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