Apophyllite crystals. Apophyllite is a general term for three separate minerals. They all consist of hydrated calcium,potassium and sodium silicates,fluorides and hydroxides. The most common form has a tetragonal structure. Apophyllite is a hydrothermal mineral found filling cavities in rocks such as basalt. This specimen is from Poona,India | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Land, Martin |
Taille de l’image : | 3244 px × 4366 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |