Apophyllite on calcite. Close-up of calcite (calcium carbonate) crystals (large,square) covered in smaller apophyllite crystals (sugar-like). This is an example of a pseudomorph,the occurrence of a mineral in a crystal system or habitat other than its own. Apophyllite is a hydrothermal mineral usually found filling cavities in igneous rocks such as basalt. It is a general term for the three separate minerals fluorapophyllite,hydroxyapophyllite,and natroapophyllite. Specimen measures 85mm in diameter | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Wiersma, Dirk |
Bildgröße: | 5616 px × 4134 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: | - |