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 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Wiersma, Dirk |
Bildgröße: | 5430 px × 3744 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |