Mineral description : Viridine

Chemical formula (Al,Mn³⁺)₂SiO₅

Hardness 7.5

Density 3.16-3.20

Color Grass green.

Habitus Ortorombic. Usually prismatic crystals with square cross section. Also as massive aggregates.

Cleavage Distinct prismatic, fracture uneven to subconchoidal.

Luster Vitreous.

Description A manganian andalusite.

Occurance In metamorphic rock as schist, quartzite and sometimes in pegmatites and hydrothermal veins.

Associates In pegmatites with korund, turmaline, topas.

Notes Polymorphs : Kyanite and Sillimanite

Locations

Västanå iron mine, Skåne. As cm sized green spots in a quartzite.
Ultevis area (mainly Tjatitsvare). As up to 5cm long crystals and aggregates in thin veins of pegmatite.

To silicate index.
Mineral group index.
Main index.

If you have some questions, suggestions or comments you are welcome to write me a line or two.

axelsson@acc.umu.se

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Last changed : 1998-03-07

Chemical formula	(Al,Mn³⁺)₂SiO₅
Hardness	7.5
Density	3.16-3.20
Color	Grass green.
Habitus	Ortorombic. Usually prismatic crystals with square cross section. Also as massive aggregates.
Cleavage	Distinct prismatic, fracture uneven to subconchoidal.
Luster	Vitreous.
Description	A manganian andalusite.
Occurance	In metamorphic rock as schist, quartzite and sometimes in pegmatites and hydrothermal veins.
Associates	In pegmatites with korund, turmaline, topas.
Notes	Polymorphs : Kyanite and Sillimanite
Locations	Västanå iron mine, Skåne. As cm sized green spots in a quartzite. Ultevis area (mainly Tjatitsvare). As up to 5cm long crystals and aggregates in thin veins of pegmatite.