Mineral description : Tremolite

Tremolite pseudomorph after diopside from Storeakersvatnet, Norway.

Tremolite from Storeakersvatnet, Norway.

Fibric tremolite from Innansjön.

Chromian tremolite with calcite from Outokumpu, Finland.

Mineral class	Silicates : Inosilicates : Tremolite - Glaucophane - Riebeckite group.
Chemical formula	Ca2Mg5(OH,F/Si4O11)2
Crystal system	Monoclinic.
Habitus	As long slender prismatic crystals. Also as needle like to fibric aggregates (asbesthos).
Cleavage	Fragile with two perfect cleavages in 124 degrees angle.
Hardness	5.5-6
Density	2.9
Color	Often pale grayish green to white.
Streak
Luster	Vitreous. Silky at fibric variants.
Description
Occurance	In scarn in metamorph rocks, especially dolomites and talky schists.
Associates
Notes
Locations	A common mineral in many mines, especially in Bergslagen. Falu mine, Falun, Dalarna. Gåsgruvan, Persberg, Värmland. Nordmark mining district, Värmland. Storeakers vatnet, Norway. As pseudomorphs after diopside. Outokumpu, Finland. As chromian tremolite with diopside and calcite.

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