White quartz pebbles on a beach. Pebbles are the smooth,eroded remains of larger rocks. Quartz (silicon dioxide) occurs in many rocks,especially igneous rocks such as granite and quartzite. Photographed on Whidbey Island in the San Juan Islands,Washington State,USA | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Svensson, Kaj R. |
Taille de l’image : | 5454 px × 2587 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |