Polarised light micrograph of a thin section of ganister.A ganister is hard, fine-grained quartzose sandstone, or orthoquartzite, used in the manufacture of silica brick typically used to line furnaces. Ganisters are cemented with secondary silica and typically have a characteristic splintery fracture. Horizontal object size: 0.25 mm. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Pasieka, Alfred |
Taille de l’image : | 4781 px × 3655 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |