Mineral description : Wermlandite

Light blue Wermlandite in calcite, from Långban.

Mineral class	Carbonates : Bastnasite - Dawsonite group
Chemical formula	(Ca,Mg)Mg7(Al,Fe+3)2(SO4)2(OH)18 12H2O
Crystal system	Rhomboedral (trigonal).
Habitus	As mica like flat crystals.
Cleavage
Hardness	1.5
Density	1.93
Color	Grayish green to light blue.
Streak
Luster	Silky.
Description
Occurance	As flat crystals in drusy calcite
Associates	0.1 mm big magnetite crystals, calcite.
Notes	Type locality : Långban, Värmland, Sweden. Discovered in 1971 by Moore. Formerly known under the name "Yggerite".
Locations	A rare mineral Långban, Värmland, Sweden. As flat greenish gray crystals in druses in a coarse limestone cutting dolomite.

To carbonate index.

Mineral group index.

Main index.

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