Double-ended quartz crystal. So-called 'phantom structures' in the left part of the crystal show successive stages of growth. As the crystal grew,clay minerals were deposited on the surface of the quartz crystal,but later became embedded as the growth continued. This specimen,about 3 centimetres across,is from the Lugnez valley,Grisons,Switzerland | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Alean, Dr. Juerg |
Taille de l’image : | 5103 px × 3437 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |