Melted gold ore (bullion). The gold ore has been melted using the "fire assay" method,which is designed to establish the content of gold in the ore. Gold is a precious metal used in jewellery and as a currency. Each sphere is around 2 centimetres in diameter | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Wiersma, Dirk |
Taille de l’image : | 5430 px × 3744 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |