Mineral description : Brucite

Brucite from Mosjöen, Norway.

Brucite as white foliated masses from Tallgruvan.

Mineral class	Oxides : Hydragillite diaspore group.
Chemical formula	Mg(OH)2
Crystal system	Hexagonal
Habitus	Occurs as hexagonal lamellaes, often as folded platy masses or fine grained aggregats. It can also be fibrous
Cleavage	Perfect, as nonplastic flakes.
Hardness	2.5
Density	2.38-2.40
Color	Reddish yellow, brown, greenish gray to white.
Streak	Vhite.
Luster	Pearly on cleavages, else greasy to silky.
Description
Occurance	In methamorph, lowtempered schists, as chlorite and talc schists. As contact metamorphic mineral in dolomite. Also in low tempered veins in carbonatic rocks.
Associates
Notes
Locations	Locally very common in some mines. Ladugruvan, Gåsgruve mining field, Persberg, Värmland. As foliated pearly masses in magnetite or as brownish yellow grains in limestone. Tallgruvan, Norberg mining field. As white foliated masses. Långban, Värmland. As thin white fillings in cracks in haussmanite and dolomite.

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