Orthoclase crystals. Orthoclase,or adularia,(potassium aluminium silicate) is a type of feldspar,and a major granite-forming mineral. This specimen measures 90mm long,and was found in Tavetsch Tal,in Graubunden,Switzerland | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Wiersma, Dirk |
Bildgröße: | 3417 px × 5125 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: | - |