Arsenic. This metalloid chemical element occurs naturally in many minerals and also in the native state,as seen here. This specimen has taken on a botryoidal (grape-like) form. This specimen was found in the Wolfgang Maassen quarry,near Schneeberg,Germany,and measures 70mm across | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Wiersma, Dirk |
Taille de l’image : | 5038 px × 4205 px |
Model Release : | Non requis |
Restrictions : | - |