Heulandite crystals. Heulandite is the collective name for a series of tectosilicate minerals in the zeolite group. Zeolites are hydrous calcium aluminium silicates,in which small amounts of sodium and potassium can replace part of the calcium. Specimen from Kilpatrick,Dumbartonshire,UK | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Natural History Museum, London |
Bildgröße: | 3811 px × 4585 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: | - |