Arfvedsonite : [Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
Orthoclase : K(AlSi3O8)
Mindat locality:
7.3cm x 3cm x 2.8cm
Photo added to mindat.org
“Excellent couple of prismatic crystals in parallel growth with very different habits. While the bigger crystal forms a short and thick prism, the second one is more elongated and very flat. The black crystals contrast with the white Orthoclase matrix.Mont Malosa, Zomba, Malawi.Found in 07/2007.Specimen size: 7.3 x 3 x 2.8 cmMain crystal size: 4.2 x 2.8 cmOrthoclase fluorescent short UV”
Jordi Fabre - 22nd January 2008
Photo added to mindat.org
“Excellent couple of prismatic crystals in parallel growth with very different habits. While the bigger crystal forms a short and thick prism, the second one is more elongated and very flat. The black crystals contrast with the white Orthoclase matrix.Mont Malosa, Zomba, Malawi.Found in 07/2007.Specimen size: 7.3 x 3 x 2.8 cmMain crystal size: 4.2 x 2.8 cmOrthoclase fluorescent short UV”
Jordi Fabre - 22nd January 2008
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