raw specimen of orthoclase feldspar tectosilicate mineral rock stone in geological museum

jewellery rock metal water light circle lighting glass gemstone leaf hand raw specimen molybdenite mineral stone dark background minerals rocks one geological museum baryte barite muscovite muscovy hydrated aluminium mica talcum clay pyrophyllite soft pale-coloured silicate aluminum bytownite sample amphiboles inosilicate pieces cassiterite microcline important igneous rock-forming tectosilicate apatite isolated white phyllosilicate potassium beryl orthoclase feldspar