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Margaritt

Margaritt

Margaritt frå Wright Mine i Chester Emery Mines i Chester i Hampden County i Massachusetts i USA. Storleik: 4.8 x 3.4 x 2.6 cm.
Generelt
KategoriGlimmerar (Fylosilikat)
Kjemisk formelCaAl2(Al2Si2)O10(OH)2
Strunz-klassifisering09.EC.30

Margaritt er eit relativt sjeldan glimmermineral (ein såkalla sprøglimmer) med samansetjing CaAl2(Al2Si2)O10(OH)2. Det opptrer i anortosittiske bergartar på Vestlandet.


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