Graphite (grey) on calcite crystals (white). Sample from near Lake Champlain,New York State,USA,and measures 70mm across | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Wiersma, Dirk |
Taille de l’image : | 3588 px × 4898 px |
Model Release : | Non requis |
Restrictions : | - |