| Dr Hypothesis asked... |
| Sunday, 01 October 2006 | |
Dr Hypothesis asked:What colour is molten gold? Why? One of our readers answered: Molten gold can be a variety of colours because it is almost always alloyed with other metals. If it contains copper it will be redder, iron makes it blue, and aluminium makes it purple, while natural bismuth and silver make it black. It may surprise you to know that gold, more often than not, contains 8–10% silver. |
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