Quartz coated with silica. The clear faces of the slender prismatic quartz crystals in this group have lost their glasslike clarity due to a thin coating of silica deposited in a later phase of mineralization. Small lumps of amorphous pyrite are seen interspersed in the sample. Actual size of sample is 130 mm top to bottom. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Wiersma, Dirk |
Taille de l’image : | 3307 px × 4296 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |