Copper specimen. Copper is one of only a few metals to occur in nature in elemental (native) form. It takes the form of reddish-brown nuggets of metal | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Science Source |
Taille de l’image : | 5184 px × 3456 px |
Model Release : | Non requis |
Restrictions : |
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